TW472249B - Laser power control device, optical head and optical recording and/or reproducing apparatus - Google Patents

Laser power control device, optical head and optical recording and/or reproducing apparatus Download PDF

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Publication number
TW472249B
TW472249B TW089112758A TW89112758A TW472249B TW 472249 B TW472249 B TW 472249B TW 089112758 A TW089112758 A TW 089112758A TW 89112758 A TW89112758 A TW 89112758A TW 472249 B TW472249 B TW 472249B
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Taiwan
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laser
patent application
output
item
scope
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TW089112758A
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Chinese (zh)
Inventor
Yoichi Oshima
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Sony Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters

Abstract

A laser power control device, optical head and optical recording and/or reproducing apparatus to set and control the output power of laser light radiated from a plurality of laser sources. The laser power control device is provided with plural variable resistors associated with the plural laser sources, a photodetector unit associated with the plural laser sources, and a laser output stabilizing unit for controlling the laser light output power at a constant predetermined level. The resistance values of the variable resistors are set so that the output power of the laser light radiated from the laser sources is at the predetermined level.

Description

經濟部智慧財產局員工消費合作社印製 五、發明説明（i ) 發明背景 發明部份 本發明係有關雷射功率控制裝置，用以控制由多個雷 射源所發躬之輸出雷射光，並係有關使用此雷射功率控制 裝置之光學頭，用於光學記錄及/或再生裝置中。 有關技藝之說明 目前，光學記錄及/或再生裝置通常裝有一雷射光源 ，此發射於光學記錄媒體上，用以記錄及/或再生資訊。 在此等裝置，所發射之雷射光之輸出功率需預設定於一預 定位準上。此等裝置中通常構製有雷射功率控制裝置，以 監視及維持輸出功率於預定位準。 目前，市面上有多種光學記錄媒體供應。許多記錄媒 體使用不同之記錄密度。此等不同之密度常需使用不同波 長之雷射光。 已發展光學記錄及/或再生裝置，此能使用若干不同 之雷射波長。如此使此等裝置可使用若干不同之光學記錄 媒體操作。此等多媒體裝置現使用獨立之雷射功率控制裝 置，以控制由每一媒體所使用之各別雷射源。然而，各別 雷射功率控制裝置之如此使用難以減小裝置之體積。而且 ，此等多媒體裝置之生產成本趨於高不可攀。 最近有提出製造多個雷射源於一單石晶片上，並安排 各雷射源相互接近。然而，如各雷射源相互密切接近安排 ，則難以設置每一雷射源之獨立雷射功率控制裝置。 本紙張尺度適用中國國家標準（CNS ) A4规格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁) 472249 A7 B7 —----—------- 五、發明説明（2 ) 發明目的 基於以上問題，本發明之目的在使用一單個雷射功率 控制裝置，控制多個雷射源。 本發明之另一目的在提供一種雷射功率控制裝置’能 控制多個雷射源所發射之各別雷射光束之輸出。 本發明之又另一目的在提供一種使用此一雷射功率控 制裝置之光學記錄及/或再生裝置。 本發明之其他目的及優點部份明顯然可知，且部份可 自說明及附圖獲得明瞭。 發明根要 爲達成以上目的’本發明提供一種雷射功率控制裝置 ，用以控制由多個雷射源所發射之各別雷射光束之輸出， 包含多個可變電阻器與雷射源關連，一單個光偵測器與雷 射光源關連，及一雷射輸出穩定器用控制雷射光之輸出， 俾由雷射源所發射之雷射光之輸出恆定。改變可變電阻器 之電阻値，以設定與可變電阻器關連之雷射源所發射之雷 射光之輸出。由雷射光源所發射之雷射光之強度由光偵測 器偵測，及雷射光之輸出由雷射輸出穩定器根據所偵得之 強度控制，俾使雷射光源所輸出之雷射光束恆定。 本發明並提供一光學頭’包含多個雷射光源，光學元 件用以發射由雷射源所發射之雷射光束於一記錄媒體上， 一光接收器用以接收來自記錄媒體之還回光，及一雷射功 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ29?公釐） (請先閲讀背面之注意事項再填寫本頁} .裝-Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (i) Background of the invention The invention relates to a laser power control device for controlling the output laser light emitted by multiple laser sources, and An optical head using the laser power control device for use in an optical recording and / or reproducing device. Description of the technology At present, optical recording and / or reproducing devices are usually equipped with a laser light source, which is emitted on an optical recording medium for recording and / or reproducing information. In these devices, the output power of the emitted laser light needs to be preset at a pre-positioning level. Laser power control devices are usually constructed in these devices to monitor and maintain the output power at a predetermined level. Currently, there are various optical recording media supplies on the market. Many recording media use different recording densities. These different densities often require the use of different wavelengths of laser light. Optical recording and / or reproducing devices have been developed, which can use several different laser wavelengths. This allows these devices to operate using several different optical recording media. These multimedia devices now use independent laser power control devices to control the individual laser sources used by each media. However, it is difficult to reduce the size of the respective laser power control devices by using such devices. Moreover, the production cost of these multimedia devices tends to be unattainable. Recently, it has been proposed to manufacture multiple laser sources on a single stone wafer, and arrange the laser sources to approach each other. However, if the laser sources are arranged in close proximity to each other, it is difficult to set up independent laser power control devices for each laser source. This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page) 472249 A7 B7 —----—------- 5. Description of the invention (2) Object of the Invention Based on the above problems, the object of the present invention is to use a single laser power control device to control multiple laser sources. Another object of the present invention is to provide a laser power control device 'capable of controlling the output of each laser beam emitted from a plurality of laser sources. Another object of the present invention is to provide an optical recording and / or reproducing apparatus using the laser power control apparatus. Other objects and advantages of the present invention are obvious in part, and part of them can be understood from the description and drawings. In order to achieve the above object, the present invention provides a laser power control device for controlling the output of each laser beam emitted by a plurality of laser sources, including a plurality of variable resistors connected to the laser source. A single light detector is connected to the laser light source, and a laser output stabilizer is used to control the output of the laser light. The output of the laser light emitted by the laser source is constant. Change the resistance of the variable resistor 设定 to set the output of the laser light emitted by the laser source associated with the variable resistor. The intensity of the laser light emitted by the laser light source is detected by the light detector, and the output of the laser light is controlled by the laser output stabilizer according to the detected intensity, so that the laser beam output by the laser light source is constant . The invention also provides an optical head including a plurality of laser light sources, an optical element for emitting a laser beam emitted by the laser source on a recording medium, and a light receiver for receiving the returning light from the recording medium. And a laser power This paper size applies the Chinese National Standard (CNS) Α4 specification (210 × 29? Mm) (Please read the precautions on the back before filling this page}. Packing-

、1T 經濟部智慧財產局員工消費合作社印製 -5- 472249 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（3 ) 率控制器用以控制由雷射源所發射之雷射光之輸出。雷射 功率控制器爲上述型式。 由本發明之雷射功率控制裝置及光學頭，可由單個電 路分別控制多個雷射源所輸出之雷射光功率。 附圖簡述 爲更完全明瞭本發明，參考以下說明及附圖，在附圖 中： 圖1爲電路圖，顯示本發明之雷射功率控制裝置之一 實施例； 圖2爲電路圖，顯示本發明之雷射功率控制裝置之另 一實施例； 圖3爲電路圖，顯示本發明之雷射功率控制裝置之又 另一實施例； 圖4爲電路圖，顯示本發明之雷射功率控制裝置之又 另一實施例； 圖5爲方塊圖，顯示本發明之光學記錄及/或再生裝 置之一實施例； 圖6爲側視圖，顯示本發明之光學頭之一實施例； 圖7爲平面圖，顯示構成本發明之光學頭之光學整合 裝置；及 圖8爲平面圖，顯示圖7所示之光學整合裝置之光接 收表面。 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 472249 A7 B7 五、發明説明（4 ) 經濟部智慧財產局員工消費合作社印製 主 要 元件對照表 1 雷 射 功 率控 制 裝 置 2 雷 射 —. 極體 4 可 變 電 阻器 6 開 關 8 功 率 監 視二 極 體 9 白 動 光 量控 制 放 大 器 1 0 放 大 器 1 2 P N P 電晶 體 1 3 電 阻 器 1 4 電 源 8 0 光 學 記 錄及 / 或 再 生 8 1 光 碟 8 2 轉 動 馬 達 8 3 光 學 頭 8 4 進 給 馬 達 8 5 數 據 機 8 6 驅 動 控 制電 路 8 7 系 統 控 制器 8 8 外 部 電 路 1 0 4 光 學 整 合裝 置 1 0 5 準 直 透 婉 1 0 6 孔 徑 1 0 7 對 物 透 婉 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -7- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（5 ) 108 追蹤控制致動器 109 矩陣處理電路 114 稜鏡 116 光學系統 117 半導體基體 118 包裝 119 玻璃蓋 125 信號偵測光偵測器 較佳宴施例之詳細說明 以下參考附圖，說明雷射功率控制裝置，光學頭，及 使用此光學頭之光學記錄及/或再生裝置之特定結構。 本發明之雷射功率控制裝置之第一實施例顯示於圖1 。此雷射功率控制裝置1控制由一第一雷射二極體2及一 第二雷射二極體3所發射之雷射光輸出。控制第一雷射二 極體2及第二雷射二極體3，以防止同時操作。 此雷射功率控制裝置1包含一第一可變電阻器4與第 一雷射二極體2關連，一第二可變電阻器5與第二雷射二 極體3關連，一第一開關6連接至第一可變電阻器4，— 第二開關7連接至第二可變電阻器5，一功率監視光二極 體8與第一及第二雷射二極體2，3關連，及一自動光量 控制放大器9用以控制雷射光輸出，俾使第一及第二雷射 二極體2，3所發射之雷射光束之輸出恆定不變。 自動光量控制放大器9包含一第一放大器1 0用以控 (請先閲讀背面之注意事項再填寫本頁) 装· 訂 本紙張尺度適用中國國家標準（CMS ) A4規格（210X297公釐） -8 - 472249 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（6 ) 制由第一雷射二極體2所發射之雷射光於恆定之位準上， 及一第二放大器1 1用以控制由第二雷射二極體所發射之 雷射光於恆定之位準上。 在此雷射功率控制裝置1中，第一可變電阻器4具有 一端連接至第一開關6 ，俾當第一開關6接通及關斷時， 此端分別接地及放開。第一可變電阻器4具有其另一端連 接至第一及第二放大器1 0 ，1 1之輸入端。同樣，第二 可變電阻器5具有一端連接至第二開關7 ，俾當第二開關 7接通及關斷時，此端分別接地及放開。第二可變電阻器 5具有其另一端連接至第一及第二放大器1 0 ，1 1之輸 入端。連接於第一及第二放大器1 0，1 1之輸入端上之 第一及第二電阻器4，5之端亦連接至光二極體8之陰極 0 第一雷射二極體2具有其陰極接地，及其陽極連接至 一 P N P電晶體1 2之集極。P N P電晶體1 2之射極連 接經一電阻器1 3至一電源1 4。當第一雷射二極體2通 時，電源1 4經由電阻器1 3饋送電壓於射極。PNP電 晶體1 2之基極連接至第一放大器1 0之輸出端。由流過 第一雷射二極體2之電流幅度控制雷射光輸出。 同樣，第二雷射二極體3具有其陰極接地，及其陽極 連接至P N P電晶體1 5之集極。P N P電晶體1 5之射 極連接經一電阻器1 6至一電源1 7。當第二雷射二極體 3通時，電源1 7經由電阻器1 6饋送電壓於射極。 P N P電晶體1 5之基極連接至第二放大器1 1之輸出端 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ------------装-- (請先閱讀背面之注意事項再填寫本頁) -9- 472249 第89112758號專利申請案 A7 中文說明書修正頁民國90年10月修正 B7 經濟部智慧財產局員工消費 五、發明説明（ ’俾由第二放大器1 1控制 幅度，從而控制雷射光輸出 流過第二雷射二極體3之電 ϋ\1 爲設定第一 定値，第一開關 接地；第二開關 浮懸。如此，當 排開關6 ，7 ， 變電阻器4之電 射光之輸出於一 一雷射二 與所偵得 放大器1 極上。Ρ_ ，與所施 雷射強度 增加基極 強度。如 強度恆定 应 f几 爲δ又 /1 y /-τ£γ Λ*Ατ· 疋値，罘 接地；第 浮懸。如 排開關6 變電阻器 極體2 之光強 0變換 Ν Ρ電 加之基 增加， 電壓， 此，光 雷射二 6接通 7切斷 設定第 俾僅使 阻，以 預定位 所發射 度成比 爲電位 晶體1 極電壓 則產生 此導致 二極體 極體 ，從 2之雷射光之 而使第 而使第 —可變 雷射二極 用第 設定 準。 /2. EB 例之 ，此 2控 成反 更多 減少 8有 —可變 第一雷 在此情 射光之 一電流 施加於 制流至 比。例 之電流 雷射驅 效調節 二可變 體2之 電阻器 射二極 形，由 強度。 。所產 Ρ Ν P 雷射二 如，如 ，放大 動電流 驅動電 輸出功率 電阻器4 電阻器5 功率位準 4。然後 體2所發 光二極體 光二極體 生之電流 電晶體1 極體之驅 光二極體 器使用此 ，從而降 流，以保 於一預 之一端 之一.端 時，安 變化可 射之雷 8偵第 8產生 由第一 2之基 動電流 8偵得 電流來 低雷射 持雷射 (請先閲讀背面之注意事項再填寫本頁) 定第二雷射二極體 ，從 ，從 二雷 用第 5Λ- 5又疋 二開關7接通 一開關6切斷 此r當設定第 ，7，俾僅使 5之電阻，以 3之雷射光之輸出功率於一預 而使第二可變電阻器5之一端 而使第一可變電阻器4之一端 射二極體3之功率位準時，安 二可變電阻器5。然後變化可 第二雷射二極體3所發射之雷 表紙張尺度適用中國國家標準（CNS ) A4規格（210X：297公釐） -10- 472249 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（8 ) 射光之輸出於一預定位準。在此情形，由光二極體8偵測 第二雷射二極體3所發射之雷射光之強度。光二極體8產 生與所偵得之光強度成比例之一電流。所產生之電流由第 二放大器1 1變換爲電位，此施加於P N P電晶體1 5之 基極上。P N P電晶體1 5控制流至雷射二極體之驅動電 流，與所施加之基極電壓成反比。例如，如光二極體8偵 得雷射強度增加，則產生更多之電流，放大器使用此電流 來增加基極電壓，此導致減少雷射驅動電流，從而降低雷 射強度。如此，光二極體8有效調節驅動電流，以保持輸 出雷射強度恆定。 由上述雷射功率控制裝置1 ，可由一單個電路設定及 控制由二雷射二極體2，3所輸出之雷射光之功率於各別 預設定位準。由使用此裝置，與每一雷射二極體設置各別 獨立之雷射功率控制裝置相較，可減小產品體積。此亦由 減少組成件之數，減少產品成本。 如第一及第二雷射二極體2，3構製於一單石單位上 ，則第一及第二雷射二極體2，3極爲接近一起。此密切 接近極難設置每一雷射二極體之個別光強度偵測裝置。丫f 此雷射功率控制裝置1中，由第一雷射二極體2及由第二 雷射二極體3所輸出之光強度之偵測由一單個功率監視光 二極體8應付。單個偵測元件之此使用可單石製造第〜及 第二雷射二極體2，3於一單個晶片中。 在上述雷射功率控制裝置1中，由於每次僅使用可_ 電阻器4，5之一，故可獨立執行任一二極體之功率設定 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） I-------------^-------訂------t ,ί (請先閱讀背面之注意事項再填寫本頁) -11 - 472249 A7 經濟部智慧財產局員工消費合作社印製 B7五、發明説明（9 ) 之調整。 以下參考圖2 ，說明本發明之雷射功率控制裝置之第 二實施例。此雷射功率控制裝置2 1控制由第一雷射二極 體2 2作爲第一光源所發射之雷射光及由第二雷射二極體 2 3作爲第二光源所發射之雷射光。控制第一雷射二極體 2 2及第二雷射二極體2 3，以防止同時操作。 此雷射功率控制裝置2 1包含一第一可變電阻器2 4 與第一雷射二極體2 2關連，一第二可變電阻器2 5與第 二雷射二極體2 3關連，一功率監視光二極體2 6與第一 及第二雷射二極體2 2 ，2 3關連，及一自動光量控制放 大器2 7用以控制雷射光輸出，俾第一及第二雷射二極體 2 2，3 3所發射之雷射光之輸出恆定不變。第一可變電 阻器2 4及第二可變電阻器2 3與光二極體2 6並聯。 自動光量控制放大器2 7包含一第一放大器2 8用以 保持由第一雷射二極體2 2所發射之雷射光之尖峰強度恆 定，及一第二放大器2 9用以保持由第二雷射二極體2 3 所發射之雷射光之尖峰強度恆定。 在此雷射功率控制裝置2 1中，第一可變電阻器4具 有一端連接至光二極體2 6之陽極，及另一端連接至第一 放大器2 8之輸入端。同樣，第二可變電阻器2 5具有其 一端連接至光二極體4 6之陽極，及另一端至第二放大器 2 9之輸入端。光二極體2 6之陰極接地。 第一雷射二極體2 2具有其陰極接地，及其陽極連接 至一 P N P電晶體3 0之集極。P N P電晶體3 0之射極 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -12- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（10 ) 連接經一電阻器3 1至一電源3 2 ，及P N P電晶體3 0 之基極連接至第一放大器2 8之輸出端。當第一雷射二極 體2 2通時，電源3 2經由電阻器3 1饋送電壓於射極。 。由流過第一雷射二極體2 2之電流幅度控制雷射光輸出 〇 ' 同樣，第二雷射二極體2 3具有其陰極接地，及其陽 極連接至一 PNP電晶體3 3之集極。PNP電晶體3 3 之射極連接經一電阻器3 4至一電源3 2。當第二雷射二 極體2 3通時，電源3 5經由電阻器3 4饋送電壓於射極 。PNP電晶體3 3之基極連接至第二放大器2 9之輸出 端，俾由第二放大器2 9控制流過第二雷射二極體2 3之 電流幅度。 當設定及控制由第一雷射二極體2 2所輸出之雷射之 功率位準時，變化第一可變電阻器2 4之電阻，以設定輸 出於一預定位準。在此狀態，由光二極體2 6偵測第一雷 射二極體2 2所發射之雷射光之強度。光二極體2 6產生 與所偵得之光強度成比例之一電流。所產生之電流由第一 放大器2 8變換爲電位，此施加於PNP電晶體3 0之基 極上。P N P電晶體3 0控制流至雷射二極體之驅動電流 ，與所施加之基極電壓成反比。例如，如光二極體2 6偵 得雷射強度增加，則產生更多之電流，放大器使用此電流 來增加基極電壓，此導致減少雷射驅動電流，從而降低雷 射強度。如此，光二極體2 6有效調節驅動電流，以保持 雷射強度恆定。 I------*-----^------、玎 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS〉A4規格（210Χ297公釐） -13 - 472249 經濟部智慧財產局員工消費合作杜印製 A7 B7五、發明説明（H ) 同樣，當設定及控制由第二雷射二極體2 3所輸出之 雷射光之功率位準時，變化可變電阻器2 5之電阻，以設 定輸出於一預定位準。在此狀態，由光二極體2 6偵測第 二雷射二極體2 3所發射之雷射光之強度。光二極體2 6 產生與所偵得之光強度成比例之一電流。所產生之電流由 第二放大器2 9變換爲電位，此施加於P N P電晶體3 3 之基極上。P N P電晶體3 3控制流至雷射二極體之驅動 電流，與所施加之基極電壓成反比。例如，如光二極體 2 6偵得雷射強度增加，則產生更多之電流，放大器使用 此電流來增加基極電壓，此導致減少雷射驅動電流，從而 降低雷射強度。如此，光二極體2 6有效調節驅動電流， 以保持雷射強度恆定。 在上述雷射功率控制裝置2 1 ，可由一單個電路獨立 控制由二雷射二極體2 2，2 3所輸出之雷射功率。與每 一雷射二極體設置各別獨立之雷射功率控制裝置之安排相 較，使用本裝置之系統可減小體積。此亦由減少組成件之 數，減少生產成本。 如第一及第二雷射二極體2 2，2 3構製於一單石單 位上，則第一及第二雷射二極體2 2，2 3相互極爲接近 。如此極難設置每一雷射二極體之個別光強度偵測裝置。 在此雷射功率控制裝置2 1中，由第一雷射二極體2 2及 由第二雷射二極體2 3所輸出之光強度之偵測由一單個光 二極體4 6應付。單個光二極體之此使用使第一及第二雷 射二極體2 2，2 3可構製於一單個晶片上 本紙張尺度適用申國國家標準（CNS ) A4規格（210X297公釐） ^^1- In In n^n If 1^—^i · - . . 士^^ i 1^1^1 n^i 一^ (請先間讀背面之注意事項再填寫本頁) -14 - 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（12) 在上述雷射功率控制裝置2 1中，由於第一可電阻器 2 4及第二可變電阻器2 5相互並聯，故大致獨立執行第 一及第二雷射二極體之輸出控制。 以下參考圖3 ，說明本發明之雷射功率控制裝置之第 三實施例。此雷射功率控制裝置4 1控制由一第一雷射二 極體4 2作爲第一光源所發射之雷射光，及由一第二雷射 二極體4 3作爲第二光源所發射之雷射光。控制第一雷射 二極體4 2及第二雷射二極體4 3，以防止同時操作。 此雷射功率控制裝置4 1包含一第一可變電阻器4 4 與第一雷射二極體4 2關連，一第二可變電阻器4 5與第 二雷射二極體4 3關連，一功率監視光二極體4 6與第一 及第二雷射二極體4 2，4 3關連，及一自動光量控制放 大器4 7用以控制雷射光輸出，俾第一及第二雷射二極體 42 ，43所發射之輸出恆定不變。第一可變電阻器4 4 及第二可變電阻器4 5與光二極體4 6串連。 自動光量控制放大器4 7包含一第一放大器4 8用以 保持由第一雷射二極體4 2所發射之雷射光之尖峰強度恆 定，及一第二放大器4 9用以保持由第二雷射二極體4 3 所發射之雷射光之尖峰強度恆定。 在此雷射功率控制裝置4 1中，第一可變電阻器4 4 具有一端接地，及另一端連接至第一放大器4 8之輸出端 。第二可變電阻器4 5具有一端連接至第一可變電阻器 4 4及第一放大器4 8之相接處，同時另一端連接至第二 放大器4 9之輸入端。連接至第二放大器4 9之輸入端之 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標率（CNS ) A4規格（210X2.97公釐） -15- 472249 A7 B7 五、發明説明（13) 該端亦連接至光二極體4 6之陽極；其陰極接地。 經濟部智慧財產局員工消費合作社印製 第 —· 雷 射 一 極 體 4 2 具 至 P N P 電 晶 體 5 0 之 集 極 接 經 - 阻 器 5 1 至 一 電 源 通 時 y 電 源 5 2 經 由 電 阻 器 晶 體 5 0 之 基 極 連 接 至 第 過 第 * 雷 射 一 極 體 4 2 之 電 晶 體 5 0 調 節 0 同 樣 ， 第 一 雷 射 極 體 極 連 接 至 —* P N P 電 晶 體 5 之 射 極 連 接 經 * 牵 m 阻 器 5 4 極 體 4 3 通 時 電 源 5 5 經 0 P N P 電 晶 體 5 3 之 基 極 端 0 由 流 過 第 ~* 田 射 — 極 體 由 電 晶 體 5 3 調. 節 〇 爲 設 定 第 一 雷 射 一 極 體 —一 預 定 位 準 5 變 化 第 — 可 變 操 作 期 間 中 5 由 光 —. 極 體 4 發 射 之 雷 射 光 0 光 一 極 體 4 例 之 —* 電 iJli 〇 所 產 生 之 % 流 > 此 施 加 於 P N P - Pa t 晶體 5 5 0 控 制 流 至 田 射 二 極 體 之 壓 成 反 比 〇 例 如 5 如 光 一 極 產 生 更 多 之 电 流 放 大 器 使 有其陰極接地，及其陽極連接 。P N P電晶體5 0之射極連 5 2。當第一雷射二極體4 2 5 1饋送電壓於射極。P N P 一放大器4 8之輸出端。由流 流控制雷射功率。此轉而由電 4 3具有其陰極接地，及其陽 3之集極。P N P電晶體5 3 至一電源5 5。當第二雷射二 由電阻器5 4饋送電壓於射極 連接至第二放大器4 9之輸出 4 3之電流控制雷射功率，此 4 2所輸出之雷射功率位準於 電阻器4 4之電阻。在其後之 6偵測第一雷射二極體4 2所 6產生與所偵得之光強度成比 由第一放大器4 8變換爲電位 0之基極上。P N P電晶體 驅動電流，與所施加之基極電 體4 8偵得雷射強度增加，貝 用此電流來增加基極電壓，此 I---------------,玎 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -16- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（14 ) 導致減少雷射驅動電流，從而降低雷射強度。如此，光二 極體4 6有效調節驅動電流，以保持輸出雷射強度恆定。 爲設定第二雷射二極體4 3所輸出之雷射光之功率位 準，變化並設定第二可變電阻器4 5之電阻，俾輸出在預 定位準上。在操作期間中，由光二極體4 6偵測第二雷射 二極體4 3所發射之光強度。光二極體4 6產生與所偵得 之光強度成比例之一電流。所產生之電流由第二放大器 4 9變換爲電位，此施加於P N P電晶體5 3之基極上。 P N P電晶體5 3控制流至雷射二極體之驅動電流，與所 施加之基極電壓成反比。例如，如光二極體4 6偵得雷射 強度增加，則產生更多之電流，放大器使用此電流來增加 基極電壓，此導致減少雷射驅動電流，從而降低雷射強度 。如此，光二極體4 6有效調節驅動電流，以保持輸出雷 射強度恆定。注意僅在第一可變電阻器4 4之電阻固定後 ，改變第二可變電阻器4 5之電阻。 由上述雷射功率控制裝置4 1 ，可由一單個電路分別 控制由二雷射二極體4 2，4 3所輸出之功率。故此，與 每一雷射二極體設置獨立之雷射功率控制裝置之安排相較 ，可減小裝置體積。此亦由減少組成件之數’減少生產成 本。 如第一及第二雷射二極體4 2，4 3構製於一單石單 位中，則第一及第二雷射二極體4 2，4 3相互極爲接近 。如此極難設置每一雷射二極體之個別光強度偵測裝置。 在此雷射功率控制裝置4 1中，由第一雷射二極體4 2及 (請先閱讀背面之注意事項再填寫本頁) •丨装. -訂 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -17- 472249 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（15 ) 第二雷射二極體4 3所輸出之光強度之偵測由一單個光二 極體4 6應付。單個光二極體之此使.用使第一及第二雷射 二極體4 2，4 3可單石構製於一單個晶片中。 在雷射功率控制裝置1中，依據本發明之第一實施例 ，獨立執行由第一可變電阻器2 4控制第一雷射二極體 22之輸出及由第二可變電阻器2 5控制第二雷射二極體 2 3之輸出。在雷射功率控制裝置2 1中，依據本發明之 第二實施例，亦獨立執行由第一可變電阻器2 4控制第一 雷射二極體2 2之輸出及由第二可變電阻器2 5控制第二 雷射二極體2 3之輸出。然而，在雷射功率控制裝置4 1 中，依據本發明之第三實施例，第一雷射二極體4 2之輸 出設定及第二雷射二極體4 3之輸出設定並非完全獨立。 可變電阻器4 4及4 5合倂，故需在第一雷射二極體4 2 之輸出設定後，方設定第二雷射二極體4 3之輸出。如此 ，控制第一雷射二極體2 2之輸出及第二雷射二極體2 3 之輸出於所需之位準上。 以下參考圖4，說明本發明之雷射功率控制裝置之第 四實施例。此雷射功率控制裝置6 1控制由一第一雷射二 極體6 2作爲第一光源所發射之雷射光，及由一第二雷射 二極體6 3作爲第二光源所發射之雷射光。控制第一雷射 二極體6 2及第二雷射二極體6 3，以產生同時操作。 此雷射功率控制裝置6 1包含一第一可變電阻器6 4 與第一雷射二極體6 2關連，一第二可變電阻器6 5與第 二雷射二極體6 3關連，一功率監視光二極體6 6與第一 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) -18 - 472249 經濟部智慧財產局員工消費合作杜印製 Μ Β7五、發明説明（16) 及第二雷射二極體6 2，6 3關連，及一自動光量控制放 大器6 7用以控制雷射光輸出，俾使第一及第二雷射二極 體6 2，6 3所發射之雷射光輸出恆定不變。 自動光量控制放大器6 7包含一第一放大器6 8用以 保持由第一雷射二極體6 2所發射之雷射光之尖峰強度恆 定，及一第二放大器6 9用以保持由第二雷射二極體6 3 所發射之雷射光之尖峰強度恆定。 在此雷射功率控制裝置6 1中，第一可變電.阻器6 4 具有一端接地，及另一端連接至第一及第二放大器6 8 ， 6 9之輸出端。同樣，第二可變電阻器6 5具有一端接地 ，同時具有其另一端連接至第一及第二放大器6 8 ，6 9 之輸入端。連接於第一及至第二放大器6 8，6 9之輸入 端上之第一及第二變電阻器6 4，6 5之端亦連接至光二 極體6 6之陽極，其陰極接地。 第一雷射二極體6 2具有其陰極接地，及其陽極連接 至一 P N P電晶體7 0之集極。P N P電晶體7 0之射極 連接經一電阻器7 1至一電源7 2。當第一雷射二極體 6 2通時，電源7 2經由電阻器7 1饋送電壓於射極。 PNP電晶體7 0之基極連接至第一放大器6 8之輸出端 。由流過第一雷射二極體6 2之電流控制雷射輸出，此轉 而由電晶體7 0調節。 同樣’第二雷射二極體6 3具有其陰極接地，及其陽 極連接至P N P電晶體7 4之集極。P N P電晶體7 4之 射極連接經一電阻器7 5至一電源7 6。當第二雷射二極 本紙張尺度適财賴家縣（CMS ) A4^ ( 21GX297公釐)~ ' -19- (請先聞讀背面之注意事項再填寫本頁) 装. 、言 472249 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（17) 體6 3通時，電源7 6經由電阻器7 5饋送電壓於射極。 p N P電晶體7 4之基極連接至第二放大器6 9之輸出端 。由流過第二雷射二極體6 3之電流控制雷射輸出，此由 電晶體7 4調節。 爲設定第一雷射二極體6 2所輸出之雷射功率位準於 一預定位準，變化第一可變電阻器6 4之電阻。在其後之 操作期間中，由光二極體6 6偵測第一雷射二極體6 2所 發射之雷射光。光二極體6 6產生與所偵測之光強度成比 例之一電流。所產生之電流由第一放大器6 8變換爲電位 ，此施加於P N P電晶體7 0之基極上。P N P電晶體 7 0控制流至雷射二極體之驅動電流，與所施加之基極電 壓成反比。例如，如光二極體6 6偵得雷射強度增加，貝ij 產生更多之電流，放大器使用此電流來增加基極電壓，此 導致減少雷射驅動電流，從而降低雷射強度。如此，光二 極體6 6有效調節驅動電流，以保持輸出雷射強度恆定。 爲設定第二雷射二極體6 3所輸出之雷射光之功率位 準，變化並設定第二可變電阻器6 5之電阻，俾輸出在預 定位準上。在操作期間中，由光二極體6 6偵測第二雷射 二極體6 3所發射之光強度。光二極體6 6產生與所偵得 之光強度成比例之一電流。所產生之電流由第二放大器 6 9變換爲電位，此施加於P N P電晶體7 4之基極上。 PNP電晶體7 4控制流至雷射二極體之驅動電流，與所 施加之基極電壓成反比。例如，如光二極體6 6偵得雷射 強度增加，則產生更多之電流，放大器使用此電流來增加 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（18 ) 基極電壓’此導致減少雷射驅動電流，從而降低雷射強度 。如此，光一.極體6 6有效調節驅動電流，以保持輸出雷 射強度恆定。 由上述雷射功率控制裝置6 1 ，可由一單個電路分別 控制由二雷射一極體6 2 ’ 6 3所輸出之功率。故此，與 每一雷射二極體設置獨立之雷射功率控制裝置之安排相較 ，可減小裝置體積。此亦由減少組成件之數，減少生產成 本。 如第一及第二雷射二極體6 2，6 3構製於一單石單 位中，則第一及第二雷射二極體6 2 ，6 3相互極爲接近 «如此極難設置每一雷射二極體之個別光強度偵測裝置。 在此雷射功率控制裝置6 1中，由第一雷射二極體6 2及 第二雷射二極體6 3所輸出之光強度之偵測由一單個光二 極體6 6應付。單個光二極體之此使用使第一及第二雷射 二極體6 2 ’ 6 3可單石構製於單個晶片中。 在雷射功率控制裝置6 1中，依據本發明之第四實施 例，由於二電阻器並聯，故第一可變電阻器6 4及第二可 變電阻器6 5之電阻値相互影響。故此，如改變第一可變 電阻器6 4之電阻値，以改變第一雷射二極體6 2之輸出 設定，則第二雷射二極體6 3之輸出設定隨之改變。同樣 ，如改變第二可變電阻器6 5之電阻値，以改變第二雷射 二極體6 3之輸出設定，則第一雷射二極體6 2之輸出設 定隨之改變。如此，第一雷射二極體6 2之輸出設定不能 與第二雷射二極體6 3獨立控制。故此，需考慮第一及第 |»^—· ^^^1 «^1— —^n HI i i n c請先閱讀背面之注意事項再填寫本頁) 訂 良 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -21 - 472249 A7 ___ B7 五、發明説明（19) 二可變電阻器6 4，6 5二者之電阻値，俾第一雷射二極 體6 2及第二雷射二極體6 3之輸出在其所需之位準上。 以下說明一種光學記錄及/或再生裝置8 0，使用裝 有上述雷射功率控制裝置之一光學頭。參考圖5 ，光學記 錄及/或再生裝置8 0包含一轉動馬達5 ，用以轉動驅動 光碟8 1 A，8 1 B ; —光學頭8 3用以照射雷射光於光 碟8 1 A，8 1 B上，及用以記錄及/或再生資訊；及一 進給馬達8 4用以沿光碟8 1 A，8 1 B之半徑.上進給光 學頭8 3。光學記錄及/或再生裝置8 0亦包含一數據機 8 5用以執行預定之調變/解調操作，一驅動控制電路 8 6用以伺服控制光學頭8 3 ，及一系統控制器8 7用以 執行整個系統控制。 經濟部智慧財產局員工消費合作社印製 1^1- mi .mf »i^i ^1^1- n^i ^ϋΜ·— (請先閲讀背面之注意事項再填寫本頁) 光學記錄及/或再生裝置8 0可使用二種光碟，供記 錄及/或再生之用。二種光碟各需要一不同之雷射。選擇 置苐一光碟8 1 A或第二光碟8 1 B於轉動馬達8 2上， 並從而轉動。例如，第一光碟8 1 A能以較第二光碟 8 1 B爲局之幣度記錄貧訊。此較局密度之資訊可由雷射 光通過透明基體而照射於資訊記錄表面上加以寫入或讀出 ，基體具有板厚度在約1 . 2 m m。 轉動馬達8 2由驅動控制電路8 6驅動，並以預定_ 度轉動。即是，作爲記錄媒體之光碟8 1 a ，8 1 b由轉 動馬達8 2頂住’並由驅動控制電路8 6所驅動之轉動馬 達8 2以預定速度轉動。 當記錄及/或再生資訊信號時，光學頭8 3照射·胃射. 本紙張尺度適用中國國家標率（CNS ) A4規格（210X297公貉） -22- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（20) 光於轉動光碟8 1 A，8 1 B上，並偵測反射回之光。光 學頭8 3具有二雷射二極體，各具有不同之掁盪波長，且 構造在應付二種光碟。光學頭8 3連接至數據機電路。當 再生資訊信號時，雷射光照射於轉動光碟8 1 A，8 1 B 上’及自光碟反射回之還回光讀出回放信號。如此所讀出 之回放信號輸送至數據機8 5。當記錄資訊信號時，由外 部電路8 8所輸入之記錄信號由數據機8 5以預定之方式 調變，並输送至光學頭8 3，此然後由調變雷射光照射光 碟8 1八’8 113，記錄資訊信號。 光學頭8 3連接至驅動電路8 6 ，在記錄及/或再生 資訊信號之期間中，由轉動光碟8 1 A，8 1 B反射回之 光產生聚焦誤差信號及追蹤誤差信號。此等誤差信號然後 輸送至驅動控制電路8 6。 數據機8 5連接至系統控制器8 7及外部電路8 8。 當記錄資訊信號於光碟8 1 A，8 1 B上時，由系統控制 器8 7控制數據機8 5，俾由外部電路8 8發送信號於其 上。所供應之信號然後經調變並輸送至光學頭8 3。數據 機8 5亦由系統控制器8 7控制，俾自光碟8 1 A， 8 1 B讀出之回放信號由光學頭8 3輸送至數據機8 5， 此然後對讀出之信號解調。由數據機8 5解調之回放信號 然後由數據機8 5輸出至外部電路8 8。 進給馬達8 4構造在置光學頭8 3於與光碟8 1 A ’ 8 1 B相關之預定位置。此進給馬達8 4連接至驅動控制 電路8 6 ，且其驅動操作由驅動控制電路控制。驅動控制 m· —^f n^i» 1 ί^ϋ ^^^1 mu ^^^1 111 ^^^1- —^1 Γ Jr 沐 、\兵 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家榡準（CNS ) A4規格（210X297公釐〉 -23- 472249 經濟部智慧財產局員工消費合作社印製 A7 B7五、發明説明（21 ) 電路8 6亦連接至轉動馬達8 2，且由系統控制器8 7控 制。如此，在記錄及/或再生資訊信號之期間中，驅動控 制電路8 6控制轉動馬達8 2之驅動，俾光碟8 1 A， 8 1 B以預定速度轉動。 驅動控制電路8 6亦連接至光學頭8 3。在記錄及/ 或再生資訊信號之期間中，聚焦誤差信號及追蹤誤差信號 供應至驅動控制電路8 6 ，俾對光學頭8 3執行聚焦伺服 及追蹤伺服操作。聚焦伺服及追蹤伺服操作由驅動一雙軸 致動器執行，適於驅動及移動光學頭8 3上所設置之一對 物透鏡。 上述光學記錄及/或再生裝置使用圖6 - 8所示之光 學頭8 3。此光學頭8 3可使用二種不同之光碟。此等光 爲第一及第二光碟8 1A，8 1B。選擇使用第一及第二 光碟8 1 A，8 1 B，以執行記錄及/或再生資訊信號之 方式顯示於圖6。 本發明之光學頭8 3之構造在使光學整合裝置1 0 4 中所含之雷射光源所發射之雷射光透射通過一準直透鏡 105，一孔徑106，及一對物透鏡107而至光碟 8 1 A，8 1 B。由光碟8 1 A，8 1 B反射回之光然後 通過準直透鏡1 〇 5，孔徑1 0 6，及對物透鏡1 0 7而 入射於光學整合裝置1 0 4上。 光學整合裝置1 〇 4包含一光偵測器用以偵測第一光 碟之雷射源之信號，一光偵測器用以偵測第二光碟上雷射 源之信號，及一光偵測器用以監視功率。此等元件整合於 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -24- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（22) 一單個包裝中’其方式以後述之。在光學整合裝置1 〇 4 中’構成各別雷射源之半導體雷射二極體沿光碟8 1 A， 8 1 B之半徑上相隔約1 〇 〇微米安排。此二半導體雷射 二極體在系統控制器8 7之控制下對光碟8 1 A，8 1 B 獨立操作。由獨立驅動二半導體雷射二極體，光學整合裝 置1 0 4選擇照射與光碟8 1 A或8 1 B相關之一波長之 雷射光’並偵測由與該光碟相關之一信號偵測光偵測器所 還回之光。由每一半導體雷射二極體所發射之雷射光落於 功率監視光二極體上，此使雷射功率控制裝置能控制雷射 功率。 準直透鏡1 0 5變換由光學整合裝置1 0 4所發射之 雷射光爲準直光束。準直透鏡1 〇 5與光學整合裝置 1 0 4相對安排，俾準直透鏡之光軸與第一光碟8 1 A之 雷射光之光軸重合，但偏離第二光碟8 1 B之雷射光之光 軸。 孔徑1 0 6爲圓形孔，構製於具有介質薄膜之一透明 板構件中，此作用如波長過濾器。用作過濾器之孔徑 1 0 6適於阻止第一光碟8 1 B用之7 8 0 n m雷射波長 ，並透射第一光碟8 1 A用之6 5 0 n m雷射波長。如此 構造之孔徑1 0 5用以修整7 8 0 n m雷射波長之波束形 狀至由開口之大小所決定之光束直徑。如此，7 8 0 n m 雷射光以經修整之光束形狀傳播，而第一光碟8 1 A用之 6 5 0 n m之雷射光則光束形狀不改變傳播。 對物透鏡1 0 7爲非球形透鏡，例如由透明合成樹脂 II----------%-----—ΐτ (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -25- 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（23) 注入模鑄製造。由合理選擇構成透鏡之苯乙烯樹脂之折射 率，對物透鏡1 0 7聚集入射於其上之第一及第二波長之 光成爲大致準直光束。該光然後傳播於所關連之光碟 8 1 A或8 1 B之信號記錄表面上。即是’對物透鏡 Γ ◦ 7構成所關連之第一及第二光碟8 1 A ’ 8 1 B之雙 焦透鏡。 對物透鏡1 0 7由一追蹤控制致動器1 〇 8 A支持’ 俾沿第一及第二光碟8 1 A，8 1 B之半徑上移動。發生 追蹤控制，俾當反應追蹤誤差信號T E而驅動追蹤控制致 動器1 0 8 A時，雷射光掃描光碟8 1 A或8 1 B之預定 軌道。對物透鏡1 0 7亦由一聚焦控制致動器1 0 8 B支 持，用以沿雷射之光軸移動。發生聚焦控制，俾當反應聚 焦誤差信號F E而驅動聚焦控制致動器1 〇 8 B時，雷射 光聚焦於光碟8 1 A或8 1 B之信號記錄表面上。 光學頭8 3設有一矩陣處理電路1 0 9 ，用以對由光 學整合裝置1 0 4之信號偵測光偵測器所接收之反射光執 行矩陣處理。此電路反應追蹤誤差量之改變而產生追蹤誤 差信號T E，反應聚焦誤差量之改變而產生聚焦誤差信號 ，及反應光碟上記錄標記（例如坑串）之改變而產生回放 信號。矩陣處理電路1 0 9產生追蹤誤差信號，此與碟型 式無關。 參考圖7 A及7 B，更詳細說明光學整合裝置1 〇 4 。光學整合裝置1 0 4爲半導體基體1 1 7所構成，其上 構製光學系統1 1 6。半導體基體1 1 7 ..丨二攜帶信號偵測 I-----------^--------訂-----I 1. (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -26- 472249 A7 B7 五、發明説明（24 ) 光偵測器 1 2 5 A，1 2 5 B，1 2 6 A，及 1 2 6 B。 光學系統1 1 6包含一棱鏡1 1 4，第一及第二半導體雷 射二極體1 1 5 A，1 1 5 B，及功率監視光偵測器 1 3 0用以控制半導體雷射二極體1 1 5 A，1 1 5 B之 雷射功率。光學系統116置於包裝118內並接線，並 由一玻璃蓋1 1 9密封，成一透明密封構件。 第一半導體雷射二極體1 1 5 A及第二半導體雷射二 極體1 1 5 B沿光碟8 1 A，8 1 B之半徑上相互分開約 1 ◦ 0微米。來自第一及第二二極體二者之雷射光向稜鏡 1 1 4發射。雖第一及第二半導體雷射二極體1 1 5A， 1 1 5 B分開顯示爲不同波長之二光發射源，但亦可整合 二光發射點於-晶片上，成爲一晶片二波長發送雷射單位 0 功率監視光偵測器1 3 0在與稜鏡1 1 4相對之第一 及第二半導體雷射二極體1 1 5 A，1 1 5 B方。如此， 光二極體接收由第一及第二半導體雷射二極體1 1 5 A， 1 1 5 B之背面所發射之雷射光。根據由此功率監視光偵 測器1 3 0所接收之雷射光之偵測結果，第一及第二半導 體雷射二極體1 1 5 A，1 1 5 B由上述第一至第四實施 例所示之雷射功率控制裝置設定於各別預定之功率位準。 在設定預定之功率位準後，控制輸出，俾雷射功率位準恆 定。 在本實施例中，第一及第二半導體雷射二極體 1 1 5 A，1 1 5 B安排相互接近，故宜使用一單個光偵 本紙張尺度適用中國國家標準（CMS ) A4規格（210X29"7公釐） ------------装-- (請先閱讀背面之注意事項再填寫本頁)1T Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -5- 472249 Printed by the Employee Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative of the Ministry of Economics and Intellectual Property Bureau A7 B7 V. Description of the invention (3) The rate controller is used to control The output of laser light emitted by a laser source. The laser power controller is of the above type. With the laser power control device and the optical head of the present invention, the laser light power output by multiple laser sources can be controlled by a single circuit, respectively. Brief description of the drawings For a more complete understanding of the present invention, reference is made to the following description and accompanying drawings, in which: FIG. 1 is a circuit diagram showing an embodiment of a laser power control device of the present invention; FIG. 2 is a circuit diagram showing the present invention FIG. 3 is a circuit diagram showing yet another embodiment of the laser power control device of the present invention; FIG. 4 is a circuit diagram showing yet another embodiment of the laser power control device of the present invention An embodiment; FIG. 5 is a block diagram showing an embodiment of the optical recording and / or reproducing apparatus of the present invention; FIG. 6 is a side view showing an embodiment of the optical head of the present invention; The optical integration device of the optical head of the present invention; and FIG. 8 is a plan view showing the light receiving surface of the optical integration device shown in FIG. (Please read the precautions on the back before filling this page) This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 472249 A7 B7 V. Description of the invention (4) Printed by the Consumers ’Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs Control main component comparison table 1 Laser power control device 2 Laser —.  Polar body 4 Variable resistor 6 Switch 8 Power monitoring diode 9 White light quantity control amplifier 1 0 Amplifier 1 2 PNP transistor 1 3 Resistor 1 4 Power supply 8 0 Optical recording and / or reproduction 8 1 Optical disc 8 2 Rotate Motor 8 3 Optical head 8 4 Feed motor 8 5 Modem 8 6 Drive control circuit 8 7 System controller 8 8 External circuit 1 0 4 Optical integration device 1 0 5 Collimation and transparency 1 0 6 Aperture 1 0 7 Object Tuan Wan (Please read the precautions on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -7- 472249 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Description of the invention (5) 108 Tracking control actuator 109 Matrix processing circuit 114 稜鏡 116 Optical system 117 Semiconductor base 118 Packaging 119 Glass cover 125 Signal detection light detector Say Laser power control devices, optical head and optical recording of the optical head and the particular structure / or reproducing apparatus of. The first embodiment of the laser power control device of the present invention is shown in FIG. 1. The laser power control device 1 controls laser light output emitted by a first laser diode 2 and a second laser diode 3. The first laser diode 2 and the second laser diode 3 are controlled to prevent simultaneous operation. The laser power control device 1 includes a first variable resistor 4 connected to the first laser diode 2, a second variable resistor 5 connected to the second laser diode 3, and a first switch. 6 is connected to the first variable resistor 4,-the second switch 7 is connected to the second variable resistor 5, a power monitoring photodiode 8 is connected to the first and second laser diodes 2, 3, and An automatic light amount control amplifier 9 is used to control the laser light output so that the output of the laser beams emitted by the first and second laser diodes 2 and 3 is constant. The automatic light quantity control amplifier 9 includes a first amplifier 10 for controlling (please read the precautions on the back before filling this page). The binding and paper size are applicable to the Chinese National Standard (CMS) A4 specification (210X297 mm) -8 -472249 A7 B7 printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the Invention (6) The laser light emitted by the first laser diode 2 is made at a constant level, and a second amplifier 1 1 It is used to control the laser light emitted by the second laser diode at a constant level. In this laser power control device 1, the first variable resistor 4 has one end connected to the first switch 6, and when the first switch 6 is turned on and off, this end is grounded and released, respectively. The first variable resistor 4 has its other ends connected to the input terminals of the first and second amplifiers 10, 11. Similarly, the second variable resistor 5 has one end connected to the second switch 7, and when the second switch 7 is turned on and off, this end is grounded and released respectively. The second variable resistor 5 has other terminals connected to the input terminals of the first and second amplifiers 10, 11. The ends of the first and second resistors 4, 5 connected to the input terminals of the first and second amplifiers 10, 1 1 are also connected to the cathode of the photodiode 8. The first laser diode 2 has its The cathode is grounded and its anode is connected to the collector of a PNP transistor 12. The emitter of the P N P transistor 12 is connected via a resistor 13 to a power source 14. When the first laser diode 2 is turned on, the power source 14 feeds a voltage to the emitter via the resistor 13. The base of the PNP transistor 12 is connected to the output of the first amplifier 10. The laser light output is controlled by the magnitude of the current flowing through the first laser diode 2. Similarly, the second laser diode 3 has its cathode grounded and its anode connected to the collector of a P N P transistor 15. The emitter of the P N P transistor 15 is connected via a resistor 16 to a power source 17. When the second laser diode 3 is turned on, the power source 17 feeds a voltage to the emitter via the resistor 16. The base of the PNP transistor 15 is connected to the output of the second amplifier 1 1. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) ------------ install- (Please read the notes on the back before filling this page) -9- 472249 No. 89112758 Patent Application A7 Chinese Manual Revised Page October 1990 Revised B7 Employee Consumption of Intellectual Property Office of the Ministry of Economic Affairs 5. Description of Invention ('俾 由The second amplifier 11 controls the amplitude so as to control the laser light output to flow through the electric diode of the second laser diode 3 to set the first fixed voltage, the first switch is grounded; the second switch is floating. The outputs of the electric light from switches 6, 7, and variable resistor 4 are on one laser two and the detected amplifier 1 pole. P_, increases the base intensity with the applied laser intensity. If the intensity is constant, f should be δ and / 1 y / -τ £ γ Λ * Ατ · 疋 値, 罘 is grounded; the first floating. For example, row switch 6 changes the light intensity of the resistor body 2 to 0, transforms the power of NP, and the base increases, so the voltage is Shoot 2 6 connect 7 cut off Set the first to only make resistance, proportional to the degree of emission at the predetermined position The potential of the 1-pole voltage of the crystal is generated, which results in a diode body, which makes the 2nd variable laser diode with the 2nd setting standard. / 2.  For example, in the case of EB, these two controls can be reduced inversely and reduced by 8—variable. The first lightning is in this case where a current of the light is applied to the current limiting ratio. For example, the current laser driving effect adjustment of the two variable body 2 resistors is a diode, which is determined by the intensity. . The produced PN P laser II is, for example, amplifying the dynamic current to drive the electric output power resistor 4 resistor 5 power level 4. Then the photodiode emitted by the body 2 is the current generated by the photodiode. The transistor 1 is used to drive the photodiode, which reduces the current to maintain one of the pre-terminated ends. At the end of the day, the changeable 8-ray detection 8th is generated by the first 2 base current 8 detected current to lower the laser holding the laser (please read the precautions on the back before filling this page). To shoot the diode, from the second laser, use the 5Λ-5 and the second switch 7 to turn on a switch 6 to cut off this r. When you set the number 7,7, only make the resistance of 5 and the output power of the laser light 3 When one end of the second variable resistor 5 and one end of the first variable resistor 4 are radiated to the power level of the diode 3 in advance, the two variable resistors 5 are installed. Then change the paper size of the laser table emitted by the second laser diode 3 to the Chinese National Standard (CNS) A4 (210X: 297 mm) -10- 472249 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 5. Description of the invention (8) The output of the emitted light is at a predetermined level. In this case, the intensity of the laser light emitted by the second laser diode 3 is detected by the photodiode 8. The photodiode 8 generates a current proportional to the intensity of the detected light. The generated current is converted into a potential by the second amplifier 11 and this is applied to the base of the P N P transistor 15. The P N P transistor 15 controls the drive current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the photodiode 8 detects an increase in laser intensity, it generates more current, and the amplifier uses this current to increase the base voltage, which results in a reduction in laser drive current and thus a reduction in laser intensity. In this way, the photodiode 8 effectively adjusts the driving current to keep the output laser intensity constant. With the laser power control device 1 described above, the power of the laser light output by the two laser diodes 2 and 3 can be set and controlled by a single circuit at respective preset positioning standards. By using this device, the volume of the product can be reduced compared with the setting of a separate laser power control device for each laser diode. This also reduces the number of components and reduces product costs. If the first and second laser diodes 2, 3 are constructed on a single stone unit, the first and second laser diodes 2, 3 are very close together. This close approach makes it extremely difficult to set up individual light intensity detection devices for each laser diode. In this laser power control device 1, the detection of the light intensity output by the first laser diode 2 and the second laser diode 3 is handled by a single power monitoring light diode 8. The single detection element can be used to manufacture the first and second laser diodes 2 and 3 in a single chip. In the above laser power control device 1, since only one of the resistors 4, 5 can be used at a time, the power setting of any diode can be performed independently. The paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) I ------------- ^ ------- Order ------ t, ί (Please read the notes on the back before filling this page)- 11-472249 A7 The B7 printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Adjustment of the Invention Note (9). The second embodiment of the laser power control device according to the present invention will be described below with reference to FIG. 2. The laser power control device 21 controls the laser light emitted by the first laser diode 22 as the first light source and the laser light emitted by the second laser diode 23 as the second light source. The first laser diode 22 and the second laser diode 23 are controlled to prevent simultaneous operation. The laser power control device 21 includes a first variable resistor 2 4 and a first laser diode 2 2, and a second variable resistor 25 and a second laser diode 23. A power monitoring light diode 26 is connected to the first and second laser diodes 2 2 and 2 3, and an automatic light amount control amplifier 27 is used to control the laser light output, and the first and second lasers The output of the laser light emitted by the diodes 2 2, 3 3 is constant. The first variable resistor 24 and the second variable resistor 23 are connected in parallel with the photodiode 26. The automatic light quantity control amplifier 27 includes a first amplifier 28 to keep the peak intensity of the laser light emitted by the first laser diode 22 constant, and a second amplifier 29 to maintain the intensity of the second laser. The peak intensity of the laser light emitted by the diode 2 3 is constant. In this laser power control device 21, the first variable resistor 4 has an anode connected to one end of the photodiode 26 and the other connected to an input end of the first amplifier 28. Similarly, the second variable resistor 25 has one end connected to the anode of the photodiode 46, and the other end connected to the input terminal of the second amplifier 29. The cathode of the photodiode 26 is grounded. The first laser diode 22 has its cathode grounded and its anode connected to a collector of a P N P transistor 30. PNP transistor 3 0 emitter (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -12- 472249 A7 B7 Employees of Intellectual Property Bureau, Ministry of Economic Affairs Printed by a consumer cooperative V. Description of the invention (10) The connection is made through a resistor 31 to a power source 3 2 and the base of the PNP transistor 30 to the output of the first amplifier 28. When the first laser diode 22 is turned on, the power source 32 feeds a voltage to the emitter via the resistor 31. . The laser light output is controlled by the amplitude of the current flowing through the first laser diode 22. Similarly, the second laser diode 23 has its cathode grounded and its anode connected to a set of PNP transistors 33. pole. The emitter of the PNP transistor 3 3 is connected via a resistor 34 to a power source 32. When the second laser diode 23 is turned on, the power source 35 feeds the voltage to the emitter via the resistor 34. The base of the PNP transistor 33 is connected to the output terminal of the second amplifier 29, and the amplitude of the current flowing through the second laser diode 23 is controlled by the second amplifier 29. When the power level of the laser output by the first laser diode 22 is set and controlled, the resistance of the first variable resistor 24 is changed to set the output to a predetermined level. In this state, the intensity of the laser light emitted by the first laser diode 22 is detected by the photodiode 26. The photodiode 26 produces a current proportional to the intensity of the detected light. The generated current is converted into a potential by the first amplifier 28, and this is applied to the base of the PNP transistor 30. The P N P transistor 30 controls the driving current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the photodiode 26 detects an increase in laser intensity, it generates more current, and the amplifier uses this current to increase the base voltage, which results in a reduction in laser drive current and thus a reduction in laser intensity. In this way, the photodiode 26 effectively adjusts the driving current to keep the laser intensity constant. I ------ * ----- ^ ------, 玎 (Please read the precautions on the back before filling this page) This paper size applies to Chinese national standards (CNS> A4 specification (210 × 297) (%) -13-472249 Employees ’cooperation with the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by A7 B7 V. Invention Description (H) Similarly, when setting and controlling the power level of the laser light output by the second laser diode 23 On time, the resistance of the variable resistor 25 is changed to set the output at a predetermined level. In this state, the intensity of the laser light emitted by the second laser diode 23 is detected by the photodiode 26. The photodiode 2 6 generates a current proportional to the detected light intensity. The generated current is converted into a potential by the second amplifier 29 and this is applied to the base of the PNP transistor 3 3. The PNP transistor 3 3 Controls the drive current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the laser diode 2 6 detects an increase in laser intensity, it generates more current, and the amplifier uses this current to increase The base voltage, which results in a reduction of the laser drive current and thus a reduction in laser intensity. The pole body 26 effectively adjusts the driving current to keep the laser intensity constant. In the above laser power control device 2 1, the laser power output by the two laser diodes 2 2 and 2 3 can be independently controlled by a single circuit. Compared with the arrangement that each laser diode is provided with an independent laser power control device, the system using this device can reduce the volume. This also reduces the number of components and reduces the production cost. And the second laser diodes 2 2, 2 3 are constructed on a single stone unit, the first and second laser diodes 2 2, 2 3 are extremely close to each other. It is extremely difficult to set each laser Individual light intensity detection device of the diode. In this laser power control device 21, the detection of the light intensity output by the first laser diode 2 2 and the second laser diode 2 3 The test is handled by a single photodiode 46. The use of a single photodiode enables the first and second laser diodes 2 2, 2 3 to be constructed on a single wafer. This paper applies the national standards of Shen Guo (CNS) A4 specification (210X297 mm) ^^ 1- In In n ^ n If 1 ^ — ^ i ·-.  .  ^^ i 1 ^ 1 ^ 1 n ^ i 1 ^ (Please read the precautions on the back before filling in this page) -14-472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs In the above laser power control device 21, since the first resistor 24 and the second variable resistor 25 are connected in parallel with each other, the output control of the first and second laser diodes is performed substantially independently. Hereinafter, a third embodiment of the laser power control device of the present invention will be described with reference to FIG. 3. The laser power control device 41 controls laser light emitted by a first laser diode 42 as a first light source, and laser light emitted by a second laser diode 4 3 as a second light source. Shoot light. The first laser diode 42 and the second laser diode 43 are controlled to prevent simultaneous operation. The laser power control device 41 includes a first variable resistor 4 4 and a first laser diode 4 2, and a second variable resistor 45 and a second laser diode 4 3. A power monitoring light diode 46 is associated with the first and second laser diodes 4 2, 4 3, and an automatic light amount control amplifier 47 is used to control the laser light output, and the first and second lasers The output emitted by the diodes 42 and 43 is constant. The first variable resistor 4 4 and the second variable resistor 45 are connected in series with the photodiode 46. The automatic light quantity control amplifier 47 includes a first amplifier 48 to keep the peak intensity of the laser light emitted by the first laser diode 42 constant, and a second amplifier 49 to maintain the intensity of the second laser. The peak intensity of the laser light emitted by the diode 4 3 is constant. In this laser power control device 41, the first variable resistor 4 4 has one end grounded and the other end connected to the output terminal of the first amplifier 48. The second variable resistor 45 has one end connected to the junction of the first variable resistor 44 and the first amplifier 48, and the other end is connected to the input terminal of the second amplifier 49. Connected to the input of the second amplifier 4 9 (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specification (210X2. 97 mm) -15- 472249 A7 B7 V. Description of the invention (13) This end is also connected to the anode of the photodiode 46; its cathode is grounded. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs— · Laser Monopole 4 2 with PNP Transistor 5 0 Collector Connection-Resistor 5 1 to a Power Supply y Power Source 5 2 Via Resistor Crystal The base of 5 0 is connected to the transistor * 2 of the first laser body 4 2 5 0 adjustment 0 Similarly, the first laser body is connected to the-* PNP transistor 5 emitter connection via * lead m Resistor 5 4 pole body 4 3 power supply 5 5 through 0 PNP transistor 5 3 base terminal 0 by flowing through ~ * Tian She — the pole body is adjusted by transistor 5 3.  Section 〇 is to set the first laser-pole—a pre-set level 5 to change—the variable operation period 5 to light—.  Polar body 4 emits laser light 0 Light-polar body 4 examples — *% current generated by electric iJli 〇 This is applied to PNP-Pat crystal 5 5 0 Controlling the pressure flowing to the field-emitting diode is inversely proportional. For example, if the light pole produces more current, the cathode has its cathode grounded and its anode connected. The emitter of P N P transistor 50 is connected to 5 2. When the first laser diode 4 2 5 1 feeds a voltage to the emitter. P N P An output terminal of the amplifier 4 8. The laser power is controlled by the flow. This in turn is caused by electricity 4 3 having its cathode grounded and its anode 3 collector. P N P transistor 5 3 to a power source 5 5. When the second laser two is fed by the resistor 5 4 and the emitter is connected to the current of the output 4 3 of the second amplifier 4 9 to control the laser power, the laser power output by this 4 2 is at the level of the resistor 4 4 Of resistance. The subsequent 6 detects the first laser diode 4 2 and generates 6 that is proportional to the detected light intensity and is converted by the first amplifier 4 8 to the base of potential 0. The driving current of the PNP transistor increases with the detected laser intensity of the applied base electrode 48. This current is used to increase the base voltage. , 玎 (Please read the notes on the back before filling this page) This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297mm) -16- 472249 A7 B7 Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs SUMMARY OF THE INVENTION (14) leads to a reduction in laser drive current, thereby reducing laser intensity. In this way, the photodiode 46 effectively adjusts the driving current to keep the output laser intensity constant. In order to set the power level of the laser light output by the second laser diode 43, the resistance of the second variable resistor 45 is changed and set, and the output is at the pre-positioning level. During operation, the intensity of the light emitted by the second laser diode 43 is detected by the photodiode 46. The photodiode 46 produces a current proportional to the detected light intensity. The generated current is converted into a potential by the second amplifier 49, which is applied to the base of the P N P transistor 53. The P N P transistor 53 controls the drive current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the intensity of the laser detected by the photodiode 4 6 increases, more current is generated, and the amplifier uses this current to increase the base voltage, which results in reducing the laser drive current and thus the laser intensity. In this way, the photodiode 46 effectively adjusts the driving current to keep the output laser intensity constant. Note that the resistance of the second variable resistor 45 is changed only after the resistance of the first variable resistor 44 is fixed. With the above laser power control device 4 1, the power output by the two laser diodes 4 2 and 4 3 can be controlled by a single circuit, respectively. Therefore, compared with the arrangement that each laser diode is provided with an independent laser power control device, the device volume can be reduced. This also reduces production costs by reducing the number of components'. If the first and second laser diodes 4 2, 4 3 are constructed in a monolithic unit, the first and second laser diodes 4 2, 4 3 are very close to each other. It is extremely difficult to set up individual light intensity detection devices for each laser diode. In this laser power control device 41, the first laser diode 4 2 and (Please read the precautions on the back before filling in this page) • 丨 installed.  -The size of the paper is in accordance with the Chinese National Standard (CNS) A4 (210X297 mm) -17- 472249 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (15) Second laser diode 4 The detection of the output light intensity is handled by a single photodiode 46. This makes a single photodiode. The first and second laser diodes 4 2, 4 3 can be monolithically fabricated in a single wafer. In the laser power control device 1, according to the first embodiment of the present invention, the output of the first laser diode 22 is controlled by the first variable resistor 24 and the second variable resistor 25 is independently performed. Controls the output of the second laser diode 23. In the laser power control device 21, according to the second embodiment of the present invention, the output of the first laser diode 22 is controlled by the first variable resistor 24 and the second variable resistor is independently performed. The device 25 controls the output of the second laser diode 23. However, in the laser power control device 41, according to the third embodiment of the present invention, the output setting of the first laser diode 42 and the output setting of the second laser diode 43 are not completely independent. The variable resistors 4 4 and 4 5 are combined, so the output of the second laser diode 4 3 needs to be set after the output of the first laser diode 4 2 is set. In this way, the output of the first laser diode 22 and the output of the second laser diode 2 3 are controlled at the required levels. Hereinafter, a fourth embodiment of the laser power control device according to the present invention will be described with reference to FIG. The laser power control device 61 controls laser light emitted by a first laser diode 62 as a first light source, and laser light emitted by a second laser diode 62 as a second light source. Shoot light. The first laser diode 62 and the second laser diode 63 are controlled to produce simultaneous operation. The laser power control device 61 includes a first variable resistor 6 4 and a first laser diode 6 2, and a second variable resistor 65 and a second laser diode 6 3. , A power monitoring photodiode 6 6 and the first paper size apply Chinese National Standard (CNS) A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page) -18-472249 Ministry of Economic Affairs Intellectual Property Bureau Consumer Consumption Cooperation Du BM7 B. V. Invention Description (16) and the second laser diode 6 2 and 6 3 are connected, and an automatic light amount control amplifier 67 is used to control the laser light output to make the first And the output of the laser light emitted by the second laser diodes 62, 63 is constant. The automatic light quantity control amplifier 67 includes a first amplifier 68 to maintain a constant peak intensity of laser light emitted by the first laser diode 62, and a second amplifier 69 to maintain a peak intensity by the second laser. The peak intensity of the laser light emitted by the diode 6 3 is constant. In this laser power control device 61, the first variable electricity. The resistor 6 4 has one end grounded, and the other end connected to the output ends of the first and second amplifiers 6 8, 6 9. Similarly, the second variable resistor 65 has one end grounded, and has the other end connected to the input terminals of the first and second amplifiers 6 8 and 6 9. The ends of the first and second variable resistors 6 4 and 65 connected to the input terminals of the first and second amplifiers 6 8 and 6 9 are also connected to the anode of the photodiode 66 and the cathode is grounded. The first laser diode 62 has its cathode grounded and its anode connected to a collector of a P N P transistor 70. The emitter of the P N P transistor 70 is connected via a resistor 71 to a power source 72. When the first laser diode 62 is turned on, the power source 72 feeds a voltage to the emitter via the resistor 71. The base of the PNP transistor 70 is connected to the output of the first amplifier 68. The laser output is controlled by the current flowing through the first laser diode 62, which in turn is adjusted by the transistor 70. Similarly, the second laser diode 63 has its cathode grounded and its anode connected to the collector of the P N P transistor 74. The emitter of the P N P transistor 7 4 is connected via a resistor 75 to a power source 76. When the second laser diode, the paper size is suitable for Laijia County (CMS) A4 ^ (21GX297 mm) ~ '-19- (Please read the precautions on the back before filling this page).  Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Invention Description (17) When the body 6 is turned on, the power source 7 6 feeds the voltage to the emitter via the resistor 75. The base of the p N P transistor 7 4 is connected to the output of the second amplifier 69. The laser output is controlled by the current flowing through the second laser diode 63, which is adjusted by the transistor 74. In order to set the laser power level output by the first laser diode 62 to a predetermined level, the resistance of the first variable resistor 64 is changed. During the subsequent operation period, the laser light emitted by the first laser diode 62 is detected by the photodiode 66. The photodiode 66 generates a current proportional to the intensity of the detected light. The generated current is converted into a potential by the first amplifier 68, which is applied to the base of the P N P transistor 70. The P N P transistor 70 controls the drive current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the intensity of the laser detected by the photodiode 66 increases, Beij generates more current, and the amplifier uses this current to increase the base voltage, which results in a reduction in the laser drive current and thus a reduction in laser intensity. In this way, the photodiode 66 effectively adjusts the driving current to keep the output laser intensity constant. In order to set the power level of the laser light output by the second laser diode 63, the resistance of the second variable resistor 65 is changed and set, and the output is at the pre-positioning level. During operation, the intensity of the light emitted by the second laser diode 63 is detected by the photodiode 66. The photodiode 66 generates a current proportional to the detected light intensity. The generated current is converted into a potential by the second amplifier 6 9 and this is applied to the base of the P N P transistor 7 4. The PNP transistor 74 controls the drive current to the laser diode, which is inversely proportional to the applied base voltage. For example, if the photodiode 6 6 detects an increase in laser intensity, it generates more current, and the amplifier uses this current to increase it (please read the precautions on the back before filling this page) The paper size applies to Chinese national standards (CNS ) A4 specification (210X297 mm) 472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (18) The base voltage 'results in reducing the laser drive current and thus the laser intensity. So, light one. The pole body 6 effectively adjusts the drive current to keep the output laser intensity constant. With the laser power control device 6 1 described above, the power output by the two laser-polar bodies 6 2 '6 3 can be controlled by a single circuit, respectively. Therefore, compared with the arrangement that each laser diode is provided with an independent laser power control device, the device volume can be reduced. This also reduces the number of components and reduces production costs. If the first and second laser diodes 6 2 and 6 3 are constructed in a single stone unit, the first and second laser diodes 6 2 and 6 3 are extremely close to each other «so extremely difficult to set each Individual light intensity detection device of a laser diode. In this laser power control device 61, the detection of the light intensity output by the first laser diode 62 and the second laser diode 63 is handled by a single light diode 66. This use of a single photodiode allows the first and second laser diodes 6 2 '6 3 to be monolithically fabricated in a single wafer. In the laser power control device 61, according to the fourth embodiment of the present invention, since the two resistors are connected in parallel, the resistances 第一 of the first variable resistor 64 and the second variable resistor 65 affect each other. Therefore, if the resistance 値 of the first variable resistor 64 is changed to change the output setting of the first laser diode 62, the output setting of the second laser diode 63 is changed accordingly. Similarly, if the resistance 値 of the second variable resistor 65 is changed to change the output setting of the second laser diode 63, the output setting of the first laser diode 62 is changed accordingly. Thus, the output setting of the first laser diode 62 cannot be controlled independently of the second laser diode 62. Therefore, it is necessary to consider the first and the first | »^ — · ^^^ 1« ^ 1— — ^ n HI iinc, please read the notes on the back before filling out this page) The size of this paper applies the Chinese National Standard (CNS) A4 specification (210X297mm) -21-472249 A7 ___ B7 V. Description of the invention (19) Resistance of two variable resistors 6 4, 6 5 値, first laser diode 6 2 and second The output of the laser diode 63 is at its required level. The following describes an optical recording and / or reproducing apparatus 80 using an optical head equipped with one of the above laser power control devices. Referring to FIG. 5, the optical recording and / or reproducing device 80 includes a rotating motor 5 for rotating and driving the optical discs 8 1 A, 8 1 B;-an optical head 8 3 for irradiating laser light on the optical discs 8 1 A, 8 1 B, and used to record and / or reproduce information; and a feed motor 8 4 is used along the radius of the disc 8 1 A, 8 1 B. Optical feed head 8 3. The optical recording and / or reproducing device 80 also includes a modem 85 for performing predetermined modulation / demodulation operations, a drive control circuit 86 for servo-controlling the optical head 8 3, and a system controller 8 7 Used to perform overall system control. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 ^ 1- mi. mf »i ^ i ^ 1 ^ 1- n ^ i ^ ϋΜ · — (Please read the notes on the back before filling out this page) Optical recording and / or reproducing device 8 0 Two kinds of optical discs can be used for recording and / or For regeneration. Each of the two discs requires a different laser. Select to place a disc 8 1 A or a second disc 8 1 B on the rotation motor 8 2 and thereby rotate. For example, the first optical disc 8 1 A can record the poor information in a currency that is more than the second optical disc 8 1 B. This local density information can be written or read by laser light through the transparent substrate and irradiated on the information recording surface. The substrate has a plate thickness of about 1.  2 m m. The rotation motor 82 is driven by the drive control circuit 86 and rotates by a predetermined degree. That is, the optical discs 8 1 a, 8 1 b as the recording medium are held by the rotation motor 8 2 'and the rotation motor 8 2 driven by the drive control circuit 86 is rotated at a predetermined speed. When recording and / or reproducing information signals, the optical head 8 3 irradiates and stomach irradiates.  This paper size applies to China's National Standards (CNS) A4 specifications (210X297 gong) -22- 472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (20) Rotating discs 8 1 A, 8 1 B, and detect the reflected light. The optical head 8 3 has two laser diodes, each having a different oscillation wavelength, and is structured to handle two kinds of optical discs. The optical head 8 3 is connected to a modem circuit. When the information signal is reproduced, the laser light is irradiated on the rotating discs 8 1 A, 8 1 B 'and reflected back from the disc to read back the playback signal. The playback signal thus read is sent to the modem 85. When the information signal is recorded, the recording signal input by the external circuit 8 8 is modulated by the modem 85 in a predetermined manner and sent to the optical head 8 3, and then the optical disc 8 is illuminated by the modulated laser light. 113. Record the information signal. The optical head 8 3 is connected to the driving circuit 8 6, and during the recording and / or reproduction of the information signal, the focus error signal and the tracking error signal are generated by the light reflected from the rotating disc 8 1 A, 8 1 B. These error signals are then supplied to the drive control circuit 86. The modem 8 5 is connected to the system controller 87 and the external circuit 88. When the information signals are recorded on the discs 8 1 A, 8 1 B, the system controller 8 7 controls the modem 8 5, and the external circuit 8 8 sends signals thereon. The supplied signal is then modulated and transmitted to the optical head 83. The modem 85 is also controlled by the system controller 87. The playback signal read from the optical disc 8 1 A, 8 1 B is transmitted by the optical head 8 3 to the modem 85, and then the read signal is demodulated. The playback signal demodulated by the modem 85 is then output by the modem 85 to an external circuit 88. The feed motor 8 4 is configured to place the optical head 8 3 at a predetermined position related to the optical disc 8 1 A '8 1 B. This feed motor 84 is connected to a drive control circuit 86, and its drive operation is controlled by the drive control circuit. Drive control m · — ^ fn ^ i »1 ί ^ ϋ ^^^ 1 mu ^^^ 1 111 ^^^ 1- — ^ 1 Γ Jr Mu, \ Bing (Please read the precautions on the back before filling this page ) This paper size applies to China National Standard (CNS) A4 (210X297 mm) -23- 472249 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 5. Invention Description (21) Circuit 8 6 is also connected to the rotating motor 8 2 and controlled by the system controller 87. Thus, during the recording and / or reproduction of the information signal, the drive control circuit 86 controls the drive of the rotary motor 8 2 and the optical disc 8 1 A, 8 1 B is predetermined Speed rotation. The drive control circuit 8 6 is also connected to the optical head 83. During the recording and / or reproduction of the information signal, the focus error signal and the tracking error signal are supplied to the drive control circuit 8 6, which is executed on the optical head 8 3 Focus servo and tracking servo operations. Focus servo and tracking servo operations are performed by driving a dual-axis actuator, which is suitable for driving and moving an object lens provided on the optical head 83. The above optical recording and / or reproducing device is used Figure 6-8 shows the optical head 8 3. This optical head 8 3Two different optical discs can be used. These lights are the first and second discs 8 1A, 8 1B. The first and second discs 8 1 A, 8 1 B are selected to perform recording and / or reproduction of information signals The mode is shown in Fig. 6. The structure of the optical head 8 3 of the present invention transmits the laser light emitted from the laser light source included in the optical integration device 104 through a collimator lens 105, an aperture 106, and a The objective lens 107 goes to the disc 8 1 A, 8 1 B. The light reflected by the disc 8 1 A, 8 1 B then passes through the collimator lens 10, the aperture 1 106, and the objective lens 107. It is incident on the optical integrated device 104. The optical integrated device 104 includes an optical detector to detect the signal of the laser source of the first optical disc, and an optical detector to detect the laser source of the second optical disc. Signal and a light detector to monitor the power. These components are integrated in (please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -24 -472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy V. Invention Description (22) In a single package, the method will be described later. In the optical integration device 104, the semiconductor laser diodes constituting the respective laser sources are separated by about 1000 microns along the radius of the optical disc 8 1 A, 8 1 B. Arrange. The two semiconductor laser diodes operate independently on the optical discs 8 1 A, 8 1 B under the control of the system controller 87. The two semiconductor laser diodes are driven independently, and the optical integration device 104 selects irradiation. Laser light of a wavelength associated with the optical disc 8 1 A or 8 1 B 'and detects the light returned by a signal detection light detector associated with the optical disc. The laser light emitted by each semiconductor laser diode falls on the power monitoring light diode, which enables the laser power control device to control the laser power. The collimating lens 105 converts the laser light emitted by the optical integration device 104 into a collimated light beam. The collimating lens 105 is arranged opposite to the optical integration device 104. The optical axis of the collimating lens coincides with the optical axis of the laser light of the first optical disc 8 1 A, but deviates from the optical axis of the laser light of the second optical disc 8 1 B. Optical axis. The aperture 10 is a circular hole, which is constructed in a transparent plate member with a dielectric film, and functions as a wavelength filter. The aperture 1 0 6 used as a filter is suitable for blocking the 7 800 nm laser wavelength used by the first optical disc 8 1 B and transmitting the 6 500 nm laser wavelength used by the first optical disc 8 1 A. The thus configured aperture 105 is used to modify the beam shape of the laser wavelength of 7 800 nm to a beam diameter determined by the size of the opening. In this way, the laser light of 780 n m propagates in a modified beam shape, while the laser light of 650 n m used in the first disc 8 1 A does not change the beam shape. The objective lens 107 is an aspheric lens, for example, made of transparent synthetic resin II ----------% ------- ΐτ (Please read the precautions on the back before filling this page) This paper Standards are applicable to Chinese National Standards (CNS) A4 specifications (210X297 mm) -25- 472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (23) Injection mold manufacturing. By appropriately selecting the refractive index of the styrene resin constituting the lens, the objective lens 107 gathers the light of the first and second wavelengths incident on it into a substantially collimated light beam. This light is then spread on the signal recording surface of the associated disc 8 1 A or 8 1 B. That is, the 'objective lens Γ ◦ 7' constitutes a bifocal lens of the first and second optical discs 8 1 A '8 1 B associated with each other. The objective lens 107 is supported by a tracking control actuator 108A, and moves along the radius of the first and second optical discs 8A, 8B. Tracking control occurs. When the tracking control actuator 10 8 A is driven in response to the tracking error signal TE, the laser light scans a predetermined track of the disc 8 1 A or 8 1 B. The objective lens 107 is also supported by a focus control actuator 108B for moving along the optical axis of the laser. Focus control occurs. When the focus control actuator 108B is driven in response to the focus error signal F E, the laser light is focused on the signal recording surface of the disc 8 1 A or 8 1 B. The optical head 83 is provided with a matrix processing circuit 10 9 for performing matrix processing on the reflected light received by the signal detection light detector of the optical integration device 104. This circuit generates a tracking error signal T E in response to a change in the amount of tracking error, a focus error signal in response to a change in the amount of focus error, and a playback signal in response to changes in recording marks (such as pit strings) on the disc. The matrix processing circuit 109 generates a tracking error signal, which is independent of the dish type. The optical integration device 104 will be described in more detail with reference to FIGS. 7A and 7B. The optical integration device 104 is composed of a semiconductor substrate 1 1 7, and an optical system 1 16 is formed thereon. Semiconductor substrate 1 1 7. . 丨 Two carry signal detection I ----------- ^ -------- Order ----- I 1.  (Please read the precautions on the back before filling this page) This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X 297 mm) -26- 472249 A7 B7 V. Description of the invention (24) Light detector 1 2 5 A, 1 2 5 B, 1 2 6 A, and 1 2 6 B. The optical system 1 1 6 includes a prism 1 1 4, first and second semiconductor laser diodes 1 1 5 A, 1 1 5 B, and a power monitoring light detector 1 3 0 for controlling the semiconductor laser 2 Laser power of polar body 1 1 5 A, 1 1 5 B. The optical system 116 is placed in the package 118 and wired, and is sealed by a glass cover 1 1 9 to form a transparent sealing member. The first semiconductor laser diode 1 1 5 A and the second semiconductor laser diode 1 1 5 B are separated from each other along the radius of the optical disc 8 1 A, 8 1 B by about 1 ◦ 0 μm. Laser light from both the first and second diodes is emitted toward 稜鏡 1 1 4. Although the first and second semiconductor laser diodes 1 1 5A and 1 1 5 B are separately shown as two light emission sources of different wavelengths, the two light emission points can also be integrated on a-wafer to become a wafer with two wavelengths. Laser unit 0 Power monitoring photodetector 1 3 0 is in the first and second semiconductor laser diodes 1 1 5 A and 1 1 5 B opposite to 稜鏡 1 1 4. In this way, the photodiode receives laser light emitted from the back surfaces of the first and second semiconductor laser diodes 1 1 5 A and 1 1 5 B. According to the detection results of the laser light received by the power monitoring light detector 130, the first and second semiconductor laser diodes 1 1 5 A, 1 1 5 B are implemented by the above-mentioned first to fourth The laser power control devices shown in the examples are set at respective predetermined power levels. After setting the predetermined power level, the output is controlled and the laser power level is constant. In this embodiment, the first and second semiconductor laser diodes 1 1 5 A and 1 1 5 B are arranged close to each other, so it is appropriate to use a single light detector. The paper size is applicable to the Chinese National Standard (CMS) A4 specification ( 210X29 " 7 mm) ------------ install-(Please read the precautions on the back before filling this page)

、tT - 經濟部智慧財產局員工消費合作社印製 -27- 472249 A7 B7 經濟部智慧財產局員工消費合作杜印製 五、發明説明（25 ) 測器作爲該二二極體之功率監視光偵測器1 3 0。 稜鏡1 1 4爲一光學組成件，用以分離入射於光碟 8 1 A，8 1 B上之雷射光，且構造成大致平行六面體’ 具有一斜表面在其一側面上。棱鏡1 1 4反射雷射光離開 其斜表面而至準直透鏡1 0 5。由光碟反射之光沿反向光 徑路傳播，並還回入射於斜表面上，並進入稜鏡。注意還 回之光落於較低之棱鏡表面（以下稱爲前面）上之一特定 位置上，約5 0 %之入射光透射通過此面，其餘.5 0 %反 射回至上稜鏡表面。爲此，稜鏡1 1 4有蒸氣沉積之鏡表 面在其上表面上。如此，反射光此時再反射離開鏡上表面 而回至下表面。此二次反射光然後入射於下表面（此後稱 爲後面）上之一不同點上，並透射通過該表面。此等表面 確保第一·次透射通過下稜鏡表面之光之強度約等於透射通 過下稜鏡表面之二次反射光之強度。 在半導體基體117上自光碟還回之第一雷射光及第 二雷射光所降落之此等部份上，分別構製有第一光碟 8 1 A用之信號偵測光偵測器1 2 5 A，1 2 6 A，及第 二光碟8 1 B用之信號偵測光偵測器1 2 5 B，1 2 6 B 。光偵測器1 2 6 A，1 2 6 B向後面安排。圖8顯示此 等光偵測器之安排。選擇半導體雷射二極體11 5A， 1 1 5 B之朝向及稜鏡1 1 4之大小，俾由光碟反射.並透 射通過稜鏡114之光形成於半導體基體117上之光束 點形狀大致爲分別在後面及前面上之一焦線及一橢圓（具 有長軸在垂直於後面之焦線之延長線上之方向）之形狀。 本紙張尺度逋用中國國家標準（CNS〉A4规格（210X297公釐） " -28- I -- ---------4----^----、玎 (請先閲讀背面之注意事項再填寫本頁) 472249 A7 B7 經濟部智慧財產局員Η消費合作社印製 五、發明説明（26 ) 大致爲方形輪廓之第二光碟8 1 B用之光偵測器 1 2 5 B ，1 2 6 B沿圓周上，並在第二光碟8 1 B之正 切方向上並列安排。此等沿第二光碟8 1 B之徑向上由延 伸於圓周正切方向上之一分隔線相互分開。形成於每一光 接收表面上之光束點沿第二光碟8 1 Β之半徑上分割爲四 節段。外前面光接收表面由參考元件m及Ρ標示。內前面 光接收表面由參考元件η及〇標示。外後面光接收表面由 參考元件Q及t標示。內後面光接收表面由爹考.兀件Γ及 S標示。 第一光碟8 1 B用之光偵測器1 2 5 A，1 2 6 A亦 大致爲方形輪廓。並沿圓周上並在第一光碟8 1 A之正切 方向上並列安排。後面光偵則器1 2 6 A構造與第二光碟 8 1 B之後面光偵測器1 2 6 B相似。然而，前面光偵測 器1 2 5 A具有光接收表面沿光碟之圓周正切方向上分割 爲二節段，但其他與第二光碟8 1 B之前面光偵測器 1 2 5 B相似。朝向前面內面及斜表面由參考元件b及c 標示。朝向前面之外面及遠離斜表面之面由元件符號e及 h標元。朝向前面之內面及遠離斜表面之面由參考元件f 及g標示。朝向後面之外面由參考元件i及1標示。朝向 後面之內面由參考元件j及k標示。 由參考元件a - t所標示之此等各種光接收表面各量 度由光碟8 1 A或8 1 B所反射之光束點之一不同節段/ 郃份之強度。半導體基體1 1 7處理由此等光接收表面所 &收之光’使用電流至電壓變換及算術演算，以輸出結果 本紙張尺度適用中關家標準（CNS ) A4胁（2lGxm公釐） I n I *^^ 土衣 . ~ 訂 (請先閱讀背面之注意事項再填寫本頁) -29 - 472249 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（27) 信號。矩陣處理電路1 0 9處理此等輸出信號，以產生追 蹤誤差信號及聚焦誤差信號，如以後所述。 對光碟8 1 A，由D — 3 D F (微分3分聚焦）方法 產生聚焦誤差信號F E A，由D P D (微分相位偵測）方法 產生追蹤誤差信號TEa，及讀出之信號RFa爲表面a至 1之和，如分別顯示於等式1 - 3。在此等等式中，符號 a至1代表由元件a至1所偵得之光所產生之電流。 FEA = (a + b + d + h + j + k)-(b + f+c + g + i + l) 等式 1 TEA = (a + b + g + h)-(c + d + e + f) 等式 2 RFA = (a + b + c + d + e + f+g + h + i+j+k + l) 等式 3 對光碟8 1 B ，由D - 3 D F方法產生聚焦誤差信號 F Eb，由推挽方法產生追蹤誤差信號T Eb，及讀出之信 號R F b爲表面m至t之和，如分別顯示於等式4 一 6。在 此等等式中，符號m至t代表由元件m至t所偵得之光所 產生之電流。 FEb二（m + p + r + s)-(n + o + q + t) 等式 4 TEb二（m + n + s + t)-(o + p + q + r) 等式 5 RFB = (m + n + o + p + q + :r + s + t) 等式 6 光學整合裝置1 0 4可由安排各別組成件，諸如稜鏡 1 1 4，第一及第二半導體雷射二極體1 1 5 A， (請先閱讀背面之注意事項再填寫本頁) b τ t 本紙張尺度適用中國國家標準（CMS ) A4規格（210X297公釐） -30 - 472249 經濟部智慧財產局員工消費合作社印製 A7 B7______ 五、發明説明（28 ) 1 1 5 B，及功率監視光二極體1 3 0於半導體基體 1 1 7上，而包裝於具有高位置精確度之小巧體積中。可 由適當安排功率監視光偵測器1 3 〇與二雷射二極體 1 1 5 A，1 1 5 B之關係，有效利用本發明之雷射功率 控制裝置》 包含本發明之光學頭在內之光學記錄及/或再生裝置 8 〇具有在不同掁盪波長上之二雷射二極體。如此能操作 於需要不同波長之雷射光之二種光碟上。即是，.本發明不 獨可選擇記錄及/或再生二種光碟之資訊信號，且亦有效 使用不同波長之雷射光束，對單一種光碟執行不同之記錄 及再生操作。 由本發明（其中，裝於光學頭8 3上之二雷射二極體 之輸出由一雷射功率控制裝置控制），由多個雷射二極體 所輸出之雷射光功率可由一單個電路分別控制。如此，由 本發明之光學記錄及/或再生裝置8 0 ，整個系統之包裝 可較之每一雷射二極體各設有一功率控制裝之包裝爲小。 而且，組成件數可減少，從而生產成本降低。故此，依據 本發明（其中，多個雷射源可由單個雷射功率控制裝置控 制）’使用此裝置之系統較之現行系統減小體積，組成件 數，生產成本。 故此，可見有效達成上述目的以及由上述可明瞭之其 他目的’且由於以上方法及所述之結構可作某些改變，而 不脫離本發明之精神及範圍，故此，上述所含及附圖所示 之所有事項應解釋爲實例，且無限制意味。 -------,---d-------訂------t (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） -31 -, TT-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -27- 472249 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Printed Description of the Invention (25) The detector is used as the power monitoring light detector of the diode Tester 1 3 0.稜鏡 1 1 4 is an optical component for separating laser light incident on the optical discs 8 1 A, 8 1 B, and is configured as a substantially parallelepiped 'having an inclined surface on one side thereof. The prism 1 1 4 reflects the laser light away from its oblique surface to the collimating lens 105. The light reflected by the disc propagates along the reverse optical path, and also returns to the inclined surface and enters the radon. Note that the returned light falls on a specific position on the lower prism surface (hereinafter referred to as the front), and about 50% of the incident light is transmitted through this surface, and the remaining .50% is reflected back to the upper surface. For this purpose, the mirror surface of 稜鏡 1 1 4 has vapor deposition on its upper surface. In this way, the reflected light now reflects off the upper surface of the mirror and returns to the lower surface. This secondary reflected light is then incident on a different point on the lower surface (hereinafter referred to as the back surface) and transmitted through the surface. These surfaces ensure that the intensity of the first transmitted light passing through the surface of the lower jaw is approximately equal to the intensity of the second reflected light transmitted through the surface of the lower jaw. On the semiconductor substrate 117, the first laser light and the second laser light returned from the optical disc fall on these parts, and a signal detecting light detector 1 for the first optical disc 8 1 A is constructed respectively. A, 1 2 6 A, and the second optical disc 8 1 B detect the photodetectors 1 2 5 B, 1 2 6 B. Light detectors 1 2 6 A, 1 2 6 B are arranged rearward. Figure 8 shows the arrangement of these light detectors. The orientation of the semiconductor laser diodes 11 5A, 1 1 5 B and the size of 稜鏡 1 1 4 are selected. 俾 is reflected by the optical disc. The shape of the beam spot formed on the semiconductor substrate 117 by the light transmitted through 稜鏡 114 is approximately A shape of a focal line and an ellipse on the back and front, respectively (having the direction of the long axis on the extension line perpendicular to the back focal line). This paper size adopts Chinese national standard (CNS> A4 specification (210X297 mm) " -28- I---------- 4 ---- ^ ----, 玎 (please first Read the notes on the back and fill in this page) 472249 A7 B7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives V. Invention Description (26) The second disc with a roughly square outline 8 1 B Photodetector 1 2 5 B, 1 2 6 B are arranged side by side along the circumference and in the tangential direction of the second optical disc 8 1 B. These are separated from each other along a radial direction of the second optical disc 8 1 B by a dividing line extending in the circumferential tangent direction The beam spot formed on each light receiving surface is divided into four segments along the radius of the second optical disc 8 1 Β. The outer front light receiving surface is indicated by reference elements m and P. The inner front light receiving surface is indicated by reference element η And 0. The light receiving surface on the outer and rear surfaces is indicated by reference elements Q and t. The light receiving surface on the inner and rear surfaces is indicated by daco. The components Γ and S. The light detector 1 2 5 A for the first optical disc 8 1 B, 1 2 6 A is also roughly square in outline. It is arranged side by side along the circumference and in the tangential direction of the first disc 8 1 A. The rear light detection The structure of the detector 1 2 6 A is similar to the rear light detector 1 2 6 B of the second optical disc 8 1 B. However, the front light detector 1 2 5 A has a light receiving surface divided into two along the circumferential tangent of the optical disc Segments, but others are similar to the front optical detector 1 2 5 B of the second optical disc 8 1 B. The inner and oblique surfaces facing the front are indicated by reference elements b and c. The faces towards the outer and front surfaces of the front and away from the oblique surface are by Element symbols e and h. The inner surface facing the front and the surface away from the inclined surface are indicated by reference elements f and g. The outer surface toward the rear is indicated by reference elements i and 1. The inner surface toward the rear is indicated by reference elements j and k Marking. The various light receiving surfaces marked by reference elements a-t each measure the intensity of a different segment / component of one of the beam spots reflected by the disc 8 1 A or 8 1 B. Semiconductor substrate 1 1 7 treatment As a result, the light receiving surface & received light 'uses current-to-voltage conversion and arithmetic calculations to output the results. This paper scale applies the Zhongguanjia standard (CNS) A4 (2lGxm mm) I n I * ^^ 土Clothing. ~ Order (Please read the precautions on the back before filling this page) -29-47 2249 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Signals of Invention (27). The matrix processing circuit 1 0 9 processes these output signals to generate tracking error signals and focus error signals, as described later. Optical disc 8 1 A, the focus error signal FEA is generated by the D-3 DF (differential 3-point focusing) method, the tracking error signal TEa is generated by the DPD (differential phase detection) method, and the read-out signal RFa is the surface a to 1 And, as shown in Equations 1-3, respectively. In this equation, the symbols a to 1 represent the currents generated by the light detected by the elements a to 1. FEA = (a + b + d + h + j + k)-(b + f + c + g + i + l) Equation 1 TEA = (a + b + g + h)-(c + d + e + f) Equation 2 RFA = (a + b + c + d + e + f + g + h + i + j + k + l) Equation 3 For disc 8 1 B, focus is generated by the D-3 DF method The error signal F Eb, the tracking error signal T Eb is generated by the push-pull method, and the read-out signal RF b is the sum of the surfaces m to t, as shown in Equations 4-6, respectively. In this equation, the symbols m to t represent currents generated by light detected by the elements m to t. FEb two (m + p + r + s)-(n + o + q + t) Equation 4 TEb two (m + n + s + t)-(o + p + q + r) Equation 5 RFB = (m + n + o + p + q +: r + s + t) Equation 6 The optical integration device 104 can be arranged by individual components such as 稜鏡 1 1 4, the first and second semiconductor lasers 2 Polar body 1 1 5 A, (Please read the precautions on the back before filling this page) b τ t This paper size is applicable to China National Standard (CMS) A4 specification (210X297 mm) -30-472249 Employees of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the consumer cooperative A7 B7______ 5. Description of the invention (28) 1 1 5 B, and the power monitoring photodiode 1 30 on the semiconductor substrate 1 17 and packaged in a small volume with high position accuracy. The relationship between the power monitoring photodetector 130 and the two laser diodes 1 15 A and 1 1 5 B can be appropriately arranged, and the laser power control device of the present invention is effectively used. The optical head of the present invention is included. The optical recording and / or reproducing device 80 has two laser diodes at different oscillation wavelengths. This allows operation on two types of optical discs that require laser light of different wavelengths. That is, the present invention not only can choose to record and / or reproduce information signals of two types of optical discs, but also effectively uses laser beams of different wavelengths to perform different recording and reproduction operations on a single type of optical disc. According to the present invention (wherein the output of the two laser diodes mounted on the optical head 83 is controlled by a laser power control device), the laser light power output by a plurality of laser diodes can be respectively determined by a single circuit. control. Thus, with the optical recording and / or reproducing device 80 of the present invention, the packaging of the entire system can be smaller than that of each laser diode provided with a power control device. Moreover, the number of components can be reduced, thereby reducing production costs. Therefore, according to the present invention (in which multiple laser sources can be controlled by a single laser power control device) ', a system using this device is smaller in size, number of components, and production costs than the current system. Therefore, it can be seen that the above-mentioned purpose and other purposes that can be understood from the above-mentioned are effectively achieved, and because the above method and the described structure can be changed without departing from the spirit and scope of the present invention, All matters shown should be interpreted as examples and are not meant to be limiting. -------, --- d ------- Order ------ t (Please read the notes on the back before filling out this page) This paper size applies to Chinese National Standards (CNS) A4 size (210 X 297 mm) -31-

Claims (1)

472249 經濟部智慧財ISM工消費合作社印製 A8 B8 C8 __ D8六、申請專利範圍 1 . 一種用以控制由多個雷射源所發射之各別雷射光 束之輸出之雷射功率控制裝置’包含： 多個可變電阻器，與多個雷射源相對應，每一可變電 阻器之電阻値可改變’以設定由對應之雷射源所發射之雷 射光束之輸出功率於一預定位準； 一單個光偵測器，用以偵測由多個雷射源所發射之雷 射光束之輸出功率；及 一輸出穩定器，用以根據所偵得之輸出功率，維持由 雷射源所發射之雷射光束之輸出功率恆定於該預定位準上 〇 2 .如申請專利範圍第1項所述之雷射功率控制裝置 ，另包含多個開關分別連接至多個可變電阻器；開關構造 在設定雷射光束之輸出功率，俾僅與設定中之雷射源相對 應之可變電阻器可操作上連接至該雷射二極體’而其餘之 可變電阻器則浮懸。 3 .如申請專利範圍第2項所述之雷射功率控制裝置 ’其中，多個開關另構造在當控制雷射光束之輸率時’僅 與控制中之雷射源相對應之可變電阻器可操作上連接至該 雷射二極體，同時其餘之可變電阻器則浮懸。 4 ·如申請專利範圍第1項所述之雷射功率控制裝置 ’其中’多個可變電阻器與光偵測器並聯。 5 .如申請專利範圍第1項所述之雷射功率控制裝置 ’其中’多個可變電阻器與光偵測器串連。 6 .如申請專利範圍第1項所述之雷射功率控制裝置 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家操準（CNS) A4規格（210X297公釐） 32- 472249 A8 B8 C8 D8 經濟部智慧財是工消費合作社印製 六、申請專利範圍 ，其中，該輸出穩定器包含與雷射源相對應之控制放大器 〇 7 . —種光學頭，包含： 多個雷射源； 一光學單位，用以傳播由多個雷射源所發射之雷射光 束至記錄媒體； 一光接收器，用以接收由記錄媒體所反射之還回光； 一功率控制器，用以控制由多個雷射源所發射之雷射 光束；該功率控制器包含與多個雷射源相對應之多個可變 電阻器；每一可變電阻器之電阻値可改變，以設定由對應 雷射源所發射之雷射光束之輸出功率於一預定位準； 一光偵測器，用以偵測由多個雷射源所發射之雷射光 束之輸出功率；及 一輸出穩定器，用以根據所偵得之輸出功率’維持由 雷射源所發射之雷射光束之輸出功率於預定位準° 8 ·如申請專利範圍第7項所述之光學頭，另包含多 個開關，分別連接至多個可變電阻器；開關構造在設定雷 身寸光束之輸出功率，俾僅與設定中之雷射源相對應之司變 電阻器方可操作上連接至雷射二極體，同時其餘可變電阻 器浮懸。 9 .如申請專利範圍第8項所述之光學頭’其中’多 個開關另構造在當控制雷射光束之輸功率時，僅與控制中 之雷射源相對應之可變電阻器可操作上連接至該雷射二極 體，同時其餘之可變電阻器則浮懸。 --------------裝------訂------線 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -33- 472249 A8 B8 C8 D8 經濟部智慧財/ί、^Μ工消費合作社印製 六、申請專利範圍 1 〇 .如申請專利範圍第7項所述之光學頭，其中， 多個可變電阻器與光偵測器並聯。 1 1 .如申請專利範圍第7項所述之光學頭，其中， 多個可變電阻器與光偵測器串連。 1 2 .如申請專利範圍第7項所述之光學頭，其中， 該輸出穩定器包含與雷射源相對應之控制放大器。 1 3 .如申請專利範圍第7項所述之光學頭，其中， 多個雷射源各發射一不同波長之雷射光束。 1 4 .如申請專利範圍第7項所述之光學頭，其中， 多個雷射源相互密切接近安排。 1 5 .如申請專利範圍第7項所述之光學頭，其中， 多個雷射源，光接收器’及光偵測器整合於一單個基體上 0 1 6 .如申請專利範圍第1 5項所述之光學頭，其中 ，光偵測器及多個雷射源分別置於與光接收器相對之側。 1 7 . —種用以在光學記錄媒體上記錄資訊及或再生 資訊之光學記錄及/或再生裝置，包含： 多個雷射源； 一光學單位，用以傳播由多個雷射源所發射之雷射光 束至記錄媒體； --光接收器，用以接收自光記錄媒體所反射之還回光 ) 一驅動器，用以轉動驅動光學記錄媒體；及 .一雷射功率控制裝置，用以控制由多個雷射源所發射 本紙張尺度適用中國國家標準（C:NS ) Α4規格（210Χ297公釐） Μ—---------^------ir------,^ (請先閱讀背面之注意事項再填寫本頁) -34- 472249 A8 B8 C8 D8 六、申請專利範圍 之各別雷射光束之輸出，包含： 多個可變電阻器，與多個雷射源相對應；每一可變電 阻器之電阻値可改變，以設定由對應之雷射源所發射之雷 射光束之輸出功率於一預定位準； 一光偵測器，用以偵測由多個雷射源所發射之雷射光 束之輸出功率；及 一輸出穩定器，用以根據所偵得之輸出功率，維持由 雷射源所發射之雷射光束之輸出功率恆定於該預定位準上 〇 1 8 .如申請專利範圍第1 7項所述之光學記錄及/ 或再生裝置，另包含多個開關分別連接至多個可變電阻器 ;開關構造在設定雷射光束之輸出功率，俾僅與設定中t 雷射源相對應之可變電阻器可操作上連接至該雷射=®體: ，同其餘之可變電阻器則浮懸。 1 9 ·如申請專利範圍第1 8項所述之光學記錄及/ 或再生裝置，其中，多個開關另構造在當控制雷射光束之· 功率時，僅與控制中之雷射源相對應之可變電阻器可'操作 上連接至該雷射二極體，同時其餘之可變電阻器則浮胃° 經濟部智慧財是A工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 2 0 .如申請專利範圍第1 7項所述之光學記錄及/ 或再生裝置，其中，多個可變電阻器與光偵測器並聯° 2 1 .如申請專利範圍第1 7項所述之光學記錄及/ 或再生裝置，其中，多個可變電阻器與光偵測器串連° 2 2 .如申請專利範圍第1 7項所述之光學記錄及/ 或再生裝置，其中，該輸出穩定器包含與雷射源相對M t472249 A8 B8 C8 __ D8 printed by the Smart Finance ISM Industrial Consumer Cooperative of the Ministry of Economic Affairs 6. Patent application scope 1. A laser power control device for controlling the output of individual laser beams emitted by multiple laser sources Contains: Multiple variable resistors corresponding to multiple laser sources. The resistance of each variable resistor can not be changed to set the output power of the laser beam emitted by the corresponding laser source to a predetermined value. Level; a single photodetector to detect the output power of the laser beam emitted by multiple laser sources; and an output stabilizer to maintain the laser output from the laser based on the detected output power The output power of the laser beam emitted by the source is constant at the predetermined level. The laser power control device described in item 1 of the patent application scope further includes a plurality of switches connected to a plurality of variable resistors, respectively; The switch is configured to set the output power of the laser beam. Only the variable resistor corresponding to the laser source in the setting can be operatively connected to the laser diode, and the remaining variable resistors are suspended. 3. The laser power control device according to item 2 of the scope of the patent application, wherein a plurality of switches are separately configured to control a laser beam output rate, and a variable resistor corresponding only to the laser source under control. The diode is operatively connected to the laser diode, while the remaining variable resistors are floating. 4 · The laser power control device according to item 1 of the scope of the patent application, wherein a plurality of variable resistors are connected in parallel with the light detector. 5. The laser power control device according to item 1 of the scope of the patent application, wherein a plurality of variable resistors are connected in series with the light detector. 6. The laser power control device as described in item 1 of the scope of patent application (please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 (210X297 mm) 32- 472249 A8 B8 C8 D8 The intellectual property of the Ministry of Economic Affairs is printed by the Industrial and Consumer Cooperatives. 6. The scope of patent application. Among them, the output stabilizer contains a control amplifier corresponding to the laser source. 0. An optical head, including: multiple lasers Radio source; an optical unit for transmitting laser beams emitted by multiple laser sources to a recording medium; a light receiver for receiving the returned light reflected by the recording medium; a power controller for To control the laser beam emitted by multiple laser sources; the power controller includes multiple variable resistors corresponding to multiple laser sources; the resistance of each variable resistor can be changed to set The output power of the laser beam emitted by the corresponding laser source is at a predetermined level; a light detector is used to detect the output power of the laser beam emitted by multiple laser sources; and an output is stable For According to the detected output power ', the output power of the laser beam emitted by the laser source is maintained at a predetermined level. 8 · The optical head described in item 7 of the patent application scope, which also includes multiple switches, respectively connected To multiple variable resistors; the switch structure is used to set the output power of the laser beam. Only the transformers that correspond to the laser source in the setting can be operatively connected to the laser diode. The variable resistor is floating. 9. The optical head according to item 8 of the scope of the patent application, wherein the plurality of switches are additionally configured to control only the variable resistor corresponding to the laser source under control when controlling the laser beam output power Is connected to the laser diode while the remaining variable resistors are floating. -------------- Install ------ Order ------ Line (Please read the notes on the back before filling this page) This paper size applies to Chinese national standards ( CNS) Α4 specification (210 × 297 mm) -33- 472249 A8 B8 C8 D8 Printed by the Ministry of Economic Affairs Smart Finance / ί, ^ Μ Industrial Consumer Cooperatives 6. Application scope of patent 1 10. The optics described in item 7 of the scope of patent application The head, wherein a plurality of variable resistors are connected in parallel with the photodetector. 1 1. The optical head according to item 7 in the scope of patent application, wherein a plurality of variable resistors are connected in series with the light detector. 12. The optical head according to item 7 in the scope of patent application, wherein the output stabilizer includes a control amplifier corresponding to a laser source. 13. The optical head according to item 7 of the scope of patent application, wherein each of the plurality of laser sources emits a laser beam of a different wavelength. 14. The optical head according to item 7 of the scope of patent application, wherein a plurality of laser sources are arranged in close proximity to each other. 15. The optical head according to item 7 in the scope of patent application, wherein multiple laser sources, light receivers' and light detectors are integrated on a single substrate. 0 1 6. As in patent scope 1 5 The optical head according to the item, wherein the light detector and the plurality of laser sources are respectively disposed on opposite sides of the light receiver. 1 7. An optical recording and / or reproducing device for recording and / or reproducing information on an optical recording medium, comprising: a plurality of laser sources; an optical unit for transmitting the emissions emitted by the plurality of laser sources A laser beam to a recording medium; a light receiver for receiving the returned light reflected from the optical recording medium) a driver for rotationally driving the optical recording medium; and a laser power control device for Controlled by multiple laser sources This paper is sized according to Chinese National Standard (C: NS) Α4 (210 × 297 mm) Μ —--------- ^ ------ ir --- ---, ^ (Please read the precautions on the back before filling this page) -34- 472249 A8 B8 C8 D8 VI. The output of the respective laser beams for patent application, including: multiple variable resistors, and Multiple laser sources correspond; the resistance of each variable resistor can be changed to set the output power of the laser beam emitted by the corresponding laser source to a predetermined level; a light detector, To detect the output power of laser beams emitted by multiple laser sources; and an output The controller is used to maintain the output power of the laser beam emitted by the laser source constant at the predetermined level according to the detected output power. The optics described in item 17 of the scope of patent application Recording and / or reproduction device, additionally including multiple switches connected to multiple variable resistors respectively; the switch is configured to set the output power of the laser beam, and only the variable resistor corresponding to the laser source in the setting can be operated Connected to this laser = ® body:, and the other variable resistors are floating. 19 · The optical recording and / or reproducing device as described in item 18 of the scope of patent application, wherein a plurality of switches are additionally configured to control only the power of the laser beam and only correspond to the laser source under control The variable resistor can be 'operably connected to the laser diode, while the remaining variable resistors are floating on the stomach. The intellectual property of the Ministry of Economic Affairs is printed by A Industry Consumer Cooperative (please read the precautions on the back before filling in This page) 2 0. The optical recording and / or reproducing device as described in item 17 of the patent application scope, wherein a plurality of variable resistors are connected in parallel with the light detector ° 2 1. As the patent application scope is 17 The optical recording and / or reproducing device according to the item, wherein a plurality of variable resistors are connected in series with the light detector ° 2 2. The optical recording and / or reproducing device as described in item 17 of the patent application scope, Wherein, the output stabilizer includes the M t relative to the laser source. 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） -35- 472249 A8 B8 C8 D8 六、申請專利範圍 控制放大器。 2 3 .如申請專利範圍第1 7項所述之光學記錄及/ 或再生裝置，其中，多個雷射源各發射一不同波長之雷射 光束。 -------1------裝------訂------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財-Α·'Η工消費合作社印製 本紙張尺度適用中國圃家標準（CNS ) Α4規格（210Χ 297公釐） -36-This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -35- 472249 A8 B8 C8 D8 VI. Patent application scope Control amplifier. 2 3. The optical recording and / or reproducing device as described in item 17 of the scope of patent application, wherein each of the plurality of laser sources emits a laser beam of a different wavelength. ------- 1 ------ install ------ order ------ line (please read the precautions on the back before filling this page) Ministry of Economic Affairs Smart Money-Α · ' The paper size printed by the Masonry Consumer Cooperative is compliant with the China Garden Standard (CNS) Α4 specification (210 × 297 mm) -36-
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CN1203477C (en) 2005-05-25
EP1067529B1 (en) 2006-04-19
JP2001085786A (en) 2001-03-30
EP1067529A3 (en) 2004-04-21
DE60027360D1 (en) 2006-05-24
US6445670B1 (en) 2002-09-03
EP1067529A2 (en) 2001-01-10
KR100800270B1 (en) 2008-02-05
JP4604304B2 (en) 2011-01-05
DE60027360T2 (en) 2007-02-01
KR20010015262A (en) 2001-02-26

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